There's been quite the string of viruses running the email circuit at my university; they come up from someone you know, with your name and a message similar to the following: (I messed with the url just in case any of you are silly enough to actually click on it.)
I'm not sure whether you have seen it?
Panda de Tueur
But I seriously sometimes wonder if there are Mac enthusiasts (extremists?) sitting around coming up with these things to get people to just give up and become a switcher. Seriously.