Answered a phone call at noon today. A recorded foreign-sounding male voice said, "Your computer is sending us a warning. Press one to speak to a Microsoft certified engineer."
I hung up without saying anything.
Oh yes, they do, as unbelievable as it seems. Just like people bite when someone phones them up offering to clean their ducts, or telling them they've won a free vacation etc. etc. If nobody bit, then they wouldn't do it.