Guy made a foolish mistake. He should have stayed home, down under, where the people live upside-down.
I think the prosecutors are reaching, but that is what prosecutors do in the US. Big cases are their scorecards, and the heck with justice, fairness, or reasonableness. Beware of ambitious prosecutors.
(Note: I do not play online poker, but I have been known to play a game or two with friends. The stock market is the real online gambling, imo. It is legal.)