You gotta have a look at this scam.. There may be better one's then this but this one just shows how desperate these people are..

The spyware keep redirecting infected machine's to the '404dnserror' page. The page looks like a generic server error, but also advertises an anti-spyware tool in the form of an ActiveX like installer toolbar at the top of the page.

Thanks goes out to SANS and reader TOM.