How bad would that guy have felt if he'd rivered on you during a hand in which he had no business at all playing? Would he have said, "Oh well, you're clearly the better player, and I just got lucky. Here's your money back." I know you have to make your monthly nut."?

Bahhhh. Stick it to that tourist. If he wants to gamble, he should be sticking to the slots or blackjack where his odds aren't so poor.