People with a pathological need for attention seldom care whether it is positive or negative.

A guy I went to high school with, who probably had Asperger's or something similar, had a number of quite extreme attention-seeking behaviours that were quite sad to observe. His baseline expression was a comically exaggerated mope, obviously intended to make someone ask "hey, what's wrong? Let me mother you and coddle you". It never worked, but that didn't matter, he wore that expression for five years straight. Standard definition of insanity and all that.

He was, of course, constantly bullied and ridiculed, which he loved, because he was at the centre of it. The most disgusting incident, which left me horrified, was when a group of five kids invited him to play "spit invaders", where he marched back and forth like a duck in a shooting gallery while they horked loogies at him. The fact he was a willing participant made it all so much worse.

Grant would seem to have a similar problem. It's probable that he gets off on the ridicule through some twisted sense of being an unsung genius abiding the slings and arrows of the philistines. He bumps the threads specifically to invite negative comments because it perversely reinforces his sense of superiority. Standard definition of etc etc...