So who knows what disorder he is sporting, I don't care overly. Maybe just one of those people who n e e d s attention and is happy even with negative attention as long as it is attention. Attention makes him feel important. Or something.
I think the best thing would be for everyone to put him on ignore. If everyone does that he becomes nothing which is the worst thing for him, better than a ban in my opinion. He'll fuss and carry on for a few days but eventually would go elsewhere. Perhaps not, but so what?