A virus can pick up someone's email list and use that list to send out more viruses supposedly coming from that person's email. I just got a blank email from Renderosity.com with a virus attached to it. I've also had emails bounce back to me (supposedly one's that I have sent) saying the address can't be found. So what happens is, a virus can stay on various servers, spreading itself, long after the virus has been cleaned off of your computer - if you even had it to begin with. So please don't go jumping to conclusions, I'm sure the more reputable websites and brokers around here have better things to do than scare away their own customers by sending out viruses to them.