"When leaving the aircraft this bastard took a picture of me and threatened that he'd plaster me all over the net and he'd make sure I'd get fired... delightful."
Well Juud,
In Germany at least if pax want to take your picture, they need your consent. If it is not given, call the friendly airport police and have them take care of it.
And even as a lawyer, I don't believe the guy makes enough money for the settlement of the court case I'd throw his way if he really were to post the pics online.