Narrative:

Flying south of the class C airspace; and under class B airspace at about 1200 feet I got an ads-B collision alert for an aircraft approaching from a 7 o'clock position. I adjusted course to increase separation. The other aircraft appeared to adjust its course to intercept mine as its altitude decreased towards mine. I adjusted course again to make mine almost 90 degrees to my original 270 heading. The aircraft's course depiction followed and appeared to be closing. I made a rapid descending 180 degree turn to visually locate the airplane. I immediately located the cessna who did appear to be following me. After my turn and descent avoided risk of collision; the aircraft then turned north and entered class C airspace. I noted my position was very close to the class C boundary and immediately turned back away to avoid entering the airspace. I did not enter class C but was uncomfortably close. As I proceeded to get further separation and continue in a generally westerly direction I noted the airplane turned again and appeared on a parallel path but at a higher altitude. As it was faster it eventually passed heading towards another class D airspace. This type of event has happened before; but rarely; when other aircraft seem to interested in the slow flying searey. It seems to be happening with increasing frequency now that ads-B is more commonly in use. The hazard of aircraft locating and inappropriately following other aircraft has not been addressed. Masking aircraft specific ads-B information would eliminate some of the close curiosity encounters.

Google
 

Original NASA ASRS Text

Title: A pilot of a amphibious kit airplane reported another aircraft intentionally tried to fly towards them to look at their aircraft.

Narrative: Flying south of the Class C airspace; and under Class B airspace at about 1200 feet I got an ADS-B collision alert for an aircraft approaching from a 7 o'clock position. I adjusted course to increase separation. The other aircraft appeared to adjust its course to intercept mine as its altitude decreased towards mine. I adjusted course again to make mine almost 90 degrees to my original 270 heading. The aircraft's course depiction followed and appeared to be closing. I made a rapid descending 180 degree turn to visually locate the airplane. I immediately located the Cessna who did appear to be following me. After my turn and descent avoided risk of collision; the aircraft then turned north and entered Class C airspace. I noted my position was very close to the Class C boundary and immediately turned back away to avoid entering the airspace. I did not enter Class C but was uncomfortably close. As I proceeded to get further separation and continue in a generally westerly direction I noted the airplane turned again and appeared on a parallel path but at a higher altitude. As it was faster it eventually passed heading towards another Class D airspace. This type of event has happened before; but rarely; when other aircraft seem to interested in the slow flying SeaRey. It seems to be happening with increasing frequency now that ADS-B is more commonly in use. The hazard of aircraft locating and inappropriately following other aircraft has not been addressed. Masking aircraft specific ADS-B information would eliminate some of the close curiosity encounters.

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.