Is it rational to reward anti-social behavior?
If you never see the guy again/deal with him again, is there any rational reason to punish him?
Punishing anti-social behavior is only worth the cost if you actually have to face the person again and deal with them. Or someone you know and care about does.
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Even if neither i nor anyone i know will ever meet him again, i still would find it gratifying(sp?) to do my part, even if it's small, in making the world a better place.
Would I make the world a better place if I rejected $10 because he was a fool and could have given me a penny?