I dont know these people all I did was put up some Leathers, some materias and others items as other players have. I started catching on to said player buying my things then eventually changing retainer names over to my actual name as if I had done something personally to them. After that they followed me into different markets. Any market I went into they had friends follow and buy my things, post it back with rude names. The occurrence at the FC house was weird because said person stood there staring at me and my friends, afking next to the marketboard and doing several emotes at us.