I have some anecdotal evidence that a PM popup screws up a spambot thing that is set up to auto-post in random threads.
So if you are around when one of these things starts bumping 10-20 threads, send it a PM and see if it stops.
* still report the posts so we can delete em
* let me know if this really works or if it's just my imagination.
I did it just now to need4blove and it seemed to halt it in it's tracks only 3 posts in. It stayed logged in for 10 minutes or so doing nothing. I did it a week or so ago and i'm pretty sure it worked then, too.
take a bite outta crime bitches.