Meh, you know, the best thing is just to ignore it. He attempted to start something by posting inane comments on my review of Grailstone Gambit, and frankly, I just ignored it.
It's a pure psychological disorder. He craves attention, positive or negative, and he's only happy when he gets it. If you ignore it, that will drive him nuts.
Besides, knowing that ignoring him has that effect is far more satisfying than giving in to the baiting.
Seriously, you should check out his comments under Grailstone Gambit, it's actually funny it's so pathetic.
Eventually, if it is 1IQ, he'll show his true colors and he'll get himself banned. It happens every time.
Chris