Yeah, we are well aware of him. We have a list of all of his 24(!) aliases going in the "back room". Actually, I prefer to think of him more as an asshole than a clown. He's not all that funny, really.
Anyway, we've just started replacing all of his posts with his IP address, encouraging people to spread it all over the Internet. The good news is that maybe, maybe, he will be gone soon. Tomorrow will only tell.
Fango