You don't know me but I know you. I am a computer hacker, and after accessing all of the hidden files and internet history on your computer, I have decided to make you a deal. I know exactly how much you earn, and if I do not receive a substantial payout from you, all of your deepest, darkest secrets will be revealed to your partner, colleagues, boss and everyone else you know. I have important contacts in the police so don't even think about calling them.