Shoutbox

I'm getting people who are saying they are receiving a message through windown's messenger that appears to be me telling them to check out whoblockedyou.net.  It varies from the effect of "Who blocked you?  whoblockedyou.net",  and "Hey check this out.  whoblockedyou.net."

I've done sweeps and have spyware and never had anything like this before.  I've never even heard of this website, and never clicked on the link.  Incidentally... I'm getting the same messages from friends on my messenger list... knowing it's not from them either.  Just wondering how common this is... and if others are experiencing the same thing!