[Calahan]

If a game states specifically that back-stabbing is to be expected, and that Machiavellian types of play and NAP's are accepted (and even encouraged) in that game, then that should be enough to ensure anything that happens within that game, stays strictly in that game alone.

If a game fails to state this info regarding NAP's etc, or states that NAP's are binding, then there is a case to be made for a players general reputation in future games to be harmed by their actions in that game (such as backstabbing).

But I think it is completely out of line to hold personal grudges against a player, or to mark their reputation as untrustworthy, for backstabbing etc. in games where it specifically states it is to be expected. It is just another rule of that game, and there should be no post-game repercussions for any player who is simply acting within the rules of the game.

If you don't like the thought of being back-stabbed, then don't sign up for games where it is an option. And if it isn't stated clearly in the rules at the sign-up stage, then make a point to ask the admin of that game about it before signing up.