No kidding. I'd been hoping that deleting their posts automatically would make it go away. And the crazy thing is that there aren't any links, and no-one here is really going to care about it.

A pity, because we don't want to really have to lock down commenting, but maybe this is why the Internet can't have nice things. In the meantime, I've just made a change that might stymie them. Will see if we get more postings in the next few days.