I've received a few private messages here in the past month or so from a user named "forumAdmin" as such:
Subject: Important message from the forum administration!
Dear(s), RayAtPlace!
A virus alert was noticed on your computer.
We highly recommend you to check your computer and perform online virus check at our site immediately: http://[link deleted by me]
I think this is first that I've come across forum-based phishing, or whatever this would be called.
Is anyone else getting such messages? Just curious.