Since Jeff, Lathe, or the moderator undoubtedly eventually look at those posts, because they are always quickly removed, I'm wondering why they aren't looked at -- at least for new users -- BEFORE they are posted. I own and moderate (along with one volunteer) a Yahoo Group; all new members are automatically placed on 'moderated' status so that their initial posts can be checked BEFORE posting. If it is clear that they are posting a message pertaining to brewing equipment (which clearly will defeat any 'bots'), then they are removed from moderated status and their post is sent. That method works very well, and doesn't subject our members (now well over 500) to spam.
Since you are obviously going to look at the post anyway, why not look at it BEFORE it is posted instead of afterwards? Spam is getting through DAILY -- ofter more than once -- and it is very annoying. Every time it happens, I need a quick homebrew to calm myself, and I'm turning into an alcoholic.

Cheers.
Bill Velek