[bav]

It may be unethical, but I don't tell someone DURING a hand once there's significant action that I saw his cards unless it's heads-up. It's far too disruptive. The whole table comes unglued and you become a bad guy. The person who exposed his cards is mad because you saw them and mad because you said something. The other players are mad because you know something they don't. The floor comes over and gets annoyed because he has to make a tough ruling, and then the other players get mad at you and the floor because the floor says he won't make the guy expose his cards, or the player who exposed his cards gets REALLY mad at the floor and you if the floor decides to force him to reveal his cards. It's completely no-win for me.

I'm usually very altruistic, but sometimes the price is too high. Preflop before there's any serious money out there, ok. After the guy folds, ok. Heads-up, ok. But not when there's still action pending from him in a multi-way pot.