A distinction with MtGOX is that it was providing a centralized exchange and legally binding contract to its users (not a smart contract), which the owners viol

A distinction with MtGOX is that it was providing a centralized exchange and legally binding contract to its users (not a smart contract), which the owners violated. In this case they'd be criminally and civilly liable. A person following the letter of a smart contract for their benefit, while not breaking the terms of any legally binding contract they've signed, has yet to be charged with a crime (to my knowledge)