I agree with Jon, who I have admired as one of the most grounded people on these boards ever since I've been coming. I've yet to respond to any of the posts by you-know-who, because it has been my experience in other discussion boards that to do so only encourages them. If this type of person can't get a rise out of anyone, then they'll go away.
As for the part about mandatory e-mail registration, I support that, but people could always make an address up, or take someone else's. It would not be a simple matter of enforcing.
Again, ignore them and they'll go away.