I have a great suggestion on dealing with this board spamming nonsense, Lamuness. Unfortunately I don’t know who maintains the BBS or if it would be possible. (More than likely it is if you have the source to the BBS program, but actually making the changes would probably suck.)
Would you be able to set up a quick add-in to the posting script to automatically delete/filter/mark/what have you posts from
a) brand new accounts (first post only) that
b) start a new thread
c) containing a URL in the message text – regardless where the URL points
So if your very first post is a new thread containing a link, any link, doesn’t matter what it is – it’s assumed to be spam and struck down. I think this would quash all of the board spams I’ve seen, unless enough other people started using the technique that the spammers picked up on it. And it’s very unlikely to catch any legitimate first-time users.
This would work because as far as I know, most board spam attempts are automated. Someone manually attempting to post this crap would probably be able to do it anyway, but the majority of board spam attempts are going to come from the automated spammers (because they’re automated, so they can spew out more).
(I would recommend not also scanning signatures, since that is not only probably harder, but more likely to result in a false positive.)