As I wore in a reply to your thread, this person can be classified as dangerous, or exhibiting dangerous behaviour. Indeed, he has many times befriented members and , once he had their trust (after a long time), he started attacking them, so much so that these people became upset, emotionally distressed, for real, not a joke. I guess that's the definition of a "troll", someone who enjoys making others suffer, driving pleasure from that.

His tactics are very "clever". He's by no means a troll to everyone. On the contrary, he maintained a list of supporters, to whom he behaves impeccably and is using this horde to appear that he's "nice" (after all, he's funny, amusing, to them--his horde of "friends"). He thus receives a lot of support that further supports his trolling activities.

He also has several accounts (I guess it's ok to do that if you're paying, like he does) that he uses to monitor members he has visited blacklisted. These members are food for his pathetic life. He goes around villifying them, behind their backs, with the help of his supporters.

The human psyche is unfathomable and all deviations from the "normal" exist.