Besides what has already been suggested, one approach for now would be to censor any text (such as links) the spammer is trying to push.
I freakin' hate bastards like this that try to capitalize on your hard work building your community. I've dealt with some real scum bags.
Is this an actual person from a competitor or similar site that is spamming, or just one of those generic spambots trying to hock viagra or a sex site?
