Online Support for Microsoft (not their real name) Tell you your computer has a virus through an advertisement when you don't Internet

I was on Drudge Report.  I am clicking through the news.  I land on an ad and I get a pop-up.  This has  happened a couple of times.  It gives you a beeping alert telling you that your computer is infected, that they are with Microsoft and its a British voice and something about pornographic spyware or some crap.  Your computer is not infected, but you can't get rid of the message without shutting your computer down.  The message says that your computer is  infected and if you don't call them to fix it because of their emergency alert, they will have no choice but to shut down your computer.

They tell you to call 855-593-2488 to fix the problem.  You listen to some musak and then an Indian sounding voice came on the line.  I told them that I was going to report them to the FBI for internet fraud.  I asked the name of the company and they told me it was Online Support for Microsoft.  He would not give me an email.

I want these people taken off the web for their scare tactics and annoyance.