Tell that to the people that were picking up Antivirus 2009/2010 from friggin Facebook.
I agree that is how 2 of my computers got the Antivirus 2010 was from facebook. With kids and some adults now days it seems they live off facebook. The virus was gotten by just browsing different friends facebook pages nothing was downloaded, but I'm sure something on those web pages was clicked on to get the computer infected.
MSE has saved my tail several times already.....:>)