The best way to deal with something like this is to pretend that it is real (in game of course) and deal with it the way that the game world would. How about bounty hunting? How about military/mafia recruiting players to hunt him down? Keep it a game. If people fall for a scam in a game, get back at him in the game. Don't suspend his account. That's just lame. I'm sure that not many people would continue to risk their characters' well being and those that do have it coming. Also, I think that would make an interesting off shoot for people on level a billion and have nothing better to do than start a war; new game content dynamically created.