I'm curious, the more I think about it's possible spammers are now using bots to post on forums as well as blogs? Is bbpress built on the same idea as WP? I think a few people ahve seen that quit smoking thread which is why I ask has anonymous posting been enabled? It seems a similar process of spam:
bot enters required fields
bot enters spam as post
First it was a bible basher, and now an anti smoker - I don't think someone would be bored enough to sit around looking for sites and spamming (if they are, well, kudos to their unique patheticism). BTW I didn't want to bump the spam so made this post seperately.
Because of the content and way they're posted it seems more difficult to filter too.