I just banned a spammer after receiving this PM:

Important message from the forum administration

Dear, DS!

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: (URL removed)
Sincerely, Forum Administration forum.glam0ur.com.

There are no administrator accounts set up to notify users about viruses and we would never send anyone such an alert. I did some googling and discovered that this seems to be the latest trend in message board spam.

So, if you receive any PM's about virus alerts, please notify a mod immediately. Be sure to give us the spammer's username and we'll lay the banhammer down.