 Even celebrities, the very rich and smart, are getting scammed. Take billionaire Shark Tank host Mark Cuban. He says that he accepted a phone call from an unknown number, someone identifying herself as Nora from Google Security. And that, by the way, is the first red flag. Google does not call customers about their accounts. Nora said that Cuban's Google account had been hacked. He should quickly retrieve the email that she just sent, provide his passwords, and then she and Google would fix his account. And fix she did. But she wasn't from Google.