I remember getting a call from here and I played along with the scam to see what they do exactly. These guys make you open up the event viewer and look for errors (which of course you will find), then gasp and moan when you tell them you found one and inform you that it's a deadly virus which is about to zap your PC. Then he made my go to a site called ammyy and wanted to take remote control and this is when I told him I knew it was a hoax.
He just scuffed and hung up
One thing I absolutely hated about Google apps is that many of the emails are flagged as "phishing", those are email sent from Google apps emails to GMAIL... so it's gmail flagging it's own emails. I know that MX records are ours, but still...