So I've been invited to some tribes and quit them after a while. Then people from the OLD tribe find me and start trolling me that they can still find me.

http://prntscr.com/42zlud

The person who's been following me is the one who's been providing a bootcamp room.

He's NOT in my friend list.

http://prntscr.com/42zn4j

When I refresh, TFM starts loading very slowly. It might be the same bug from a long time ago where the tribe menu still appeared even when you quit. But people can still find me without the tribe menu being opened this time.