Narrative:

Passenger boarded last; chose bulkhead seat 1-C. He had trouble getting bags in bin and slammed bins. He approached fwd galley asking C flight attendant for band-aid with finger bleeding. The operations agent came to finish up and I asked him what was going on with this passenger. I was told he was okay; they couldn't smell alcohol on him. He was probably tired from being out with business friends during the night. I voiced my concern of his wobbling; and his very slow movements and drifting off. I was told he was fine. The door was closed. During takeoff; he was loud trying to engage passenger in 1-A who feigned sleep. During service; he continually got up for the forward galley restroom but could not find the door; even trying the cockpit door. I stayed in the galley unless he was sleeping during most of the entire flight for security reasons. The B and C flight attendants were made aware of the situation. He continued his lavatory routine many times. At one point; he was returning to his seat and I heard a thud. He had fallen into the bulkhead row and was picking himself getting back to his seat. I asked if he was ok and he at first didn't respond. I asked again and he mumbled yes. I went back to fwd galley and I turned; he was right there backing me up saying he went to the doctor and had taken codeine and I had no right to ask him anything. I explained that I wanted to be sure he had not injured himself with the fall. He returned to his seat. He then shouted that he wanted my name. I stepped to the aisle and stated [my name]. He wanted my last name which I said we do not give out [last names] but [company] has that info and knows who is working. He was upset. I turned to my galley and he jumped up and came at me with his phone and snapped my picture. I immediately asked him to delete it. He returned to his seat saying no. I calmly told him that he cannot take a crew members picture without permission and he needed to delete it or have ground personnel meet the plane when we land. He refused. So I clearly stated; you are making the choice to have someone meet the aircraft because you are refusing to delete the picture. He just sat mumbling. The C flight attendant had come forward at that time and saw most of this. She then went back to take care of the cabin. I did tell her I was going to inform the captain and ask for ground assistance. I did call the captain; however; at that time; they were being diverted due to runway issues in ZZZ so he told me he would get back to me. I stayed in the galley waiting for the captain to call. I was cleaning up when this passenger; who had been mumbling and talking most of this time; came up at me again; backing me up saying I was going down the wrong path with him. I firmly told him to sit down. The captain called and informed the crew of the diversion and ZZZ issues. He asked about the passenger situation. I quickly gave a summary and asked for ground assistance. We diverted to ZZZ1. On landing; this passenger jumped up to get his bags saying he was leaving. Ops met the plane and police were quickly there along with ground supervisor. I gave a statement to police. We received witness names and numbers along with a statement from a passenger who witnessed this passenger in [departure airport] in the gate area. This was given to police.stop allowing passengers that are clearly under the influence of something to board. I don't know what else to say. These passengers are allowed and enabled. There should be no arguement or debate. If someone is asking if you have been drinking or taking medication; then it's a pretty good bet your behavior brought attention to you. Flight crew does look out for these issues. Our far states we cannot let them onboard. We do not! We bring attention to the operations agent or supervisor or; our captains; and then we are continually told 'they are fine' or 'they will sleep' or 'this is the last flight out'. Someone has to stop allowing this. Deny boarding; and stopenabling this behavior. Alcohol related issues are one of the biggest conversations among crew. [The passengers] expect endless alcohol. Drugs are unseen and are hard to detect but just as dangerous; and then you mix the two. Something has to be done to stop allowing this without there being serious consequences to the passenger! This situation has shown me just how vulnerable we are. I could have been physically hurt. I was trapped by this man. For the entire flight; I was on the highest alert in my head. My anxiety level hit me after we landed back in base. I am still having anxiety each time I have to file a report. My passengers could have been hurt. My captain was busy with a last minute flight diversion due to runway issues in ZZZ; and had to acknowledge this situation. This puts everyone in harm's way. This man should never have been allowed on this aircraft. One of the witness statements was that he observed this man in [departure airport] and was shocked he was allowed on the aircraft at the very last minute. 74 people were trapped at 35K with him. I am not management; I do not get to have a say in how our passengers are handled. I only know I; my crew; and the rest of the passengers are put at risk for the sake of one individual.

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Original NASA ASRS Text

Title: B737-700 Flight Attendant reported a passenger became enough of an issue that police met the aircraft at destination.

Narrative: Passenger boarded last; chose bulkhead seat 1-C. He had trouble getting bags in bin and slammed bins. He approached fwd galley asking C Flight Attendant for Band-aid with finger bleeding. The OPS agent came to finish up and I asked him what was going on with this passenger. I was told he was okay; they couldn't smell alcohol on him. He was probably tired from being out with business friends during the night. I voiced my concern of his wobbling; and his very slow movements and drifting off. I was told he was fine. The door was closed. During takeoff; he was loud trying to engage passenger in 1-A who feigned sleep. During service; he continually got up for the forward galley restroom but could not find the door; even trying the cockpit door. I stayed in the galley unless he was sleeping during most of the entire flight for security reasons. The B and C flight attendants were made aware of the situation. He continued his lavatory routine many times. At one point; he was returning to his seat and I heard a thud. He had fallen into the bulkhead row and was picking himself getting back to his seat. I asked if he was ok and he at first didn't respond. I asked again and he mumbled yes. I went back to fwd galley and I turned; he was right there backing me up saying he went to the doctor and had taken codeine and I had no right to ask him anything. I explained that I wanted to be sure he had not injured himself with the fall. He returned to his seat. He then shouted that he wanted my name. I stepped to the aisle and stated [my name]. He wanted my last name which I said we do not give out [last names] but [Company] has that info and knows who is working. He was upset. I turned to my galley and he jumped up and came at me with his phone and snapped my picture. I immediately asked him to delete it. He returned to his seat saying NO. I calmly told him that he cannot take a crew members picture without permission and he needed to delete it or have ground personnel meet the plane when we land. He refused. So I clearly stated; you are making the choice to have someone meet the aircraft because you are refusing to delete the picture. He just sat mumbling. The C Flight Attendant had come forward at that time and saw most of this. She then went back to take care of the cabin. I did tell her I was going to inform the Captain and ask for ground assistance. I did call the Captain; however; at that time; they were being diverted due to runway issues in ZZZ so he told me he would get back to me. I stayed in the galley waiting for the Captain to call. I was cleaning up when this passenger; who had been mumbling and talking most of this time; came up at me again; backing me up saying I was going down the wrong path with him. I firmly told him to sit down. The Captain called and informed the crew of the diversion and ZZZ issues. He asked about the passenger situation. I quickly gave a summary and asked for ground assistance. We diverted to ZZZ1. On landing; this passenger jumped up to get his bags saying he was leaving. Ops met the plane and police were quickly there along with ground Supervisor. I gave a statement to police. We received witness names and numbers along with a statement from a passenger who witnessed this passenger in [departure airport] in the gate area. This was given to police.Stop allowing passengers that are clearly under the influence of something to board. I don't know what else to say. These passengers are allowed and enabled. There should be no arguement or debate. If someone is asking if you have been drinking or taking medication; then it's a pretty good bet your behavior brought attention to you. Flight crew DOES look out for these issues. Our FAR states we cannot let them onboard. WE do not! We bring attention to the OPS agent or Supervisor or; our Captains; and then we are continually told 'they are fine' or 'they will sleep' or 'this is the last flight out'. Someone has to stop allowing this. Deny boarding; and stopenabling this behavior. Alcohol related issues are one of the biggest conversations among crew. [The passengers] expect ENDLESS alcohol. Drugs are unseen and are hard to detect but just as dangerous; and then you mix the two. Something has to be done to stop allowing this without there being serious consequences to the passenger! This situation has shown me just how vulnerable we are. I could have been physically hurt. I was trapped by this man. For the entire flight; I was on the highest alert in my head. My anxiety level hit me after we landed back in base. I am still having anxiety each time I have to file a report. My passengers could have been hurt. My Captain was busy with a last minute flight diversion due to runway issues in ZZZ; and had to acknowledge this situation. This puts everyone in harm's way. This man should NEVER have been ALLOWED on this aircraft. One of the witness statements was that he observed this man in [departure airport] and was shocked he was allowed on the aircraft at the very last minute. 74 people were trapped at 35K with him. I am not Management; I do not get to have a say in how our passengers are handled. I only know I; my crew; and the rest of the passengers are put at risk for the sake of ONE individual.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.