[militarist]

Zapmeister, I understand your point, and in theory, in some kind of community it could be a good idea to have such experiment with such rules. No problems. But I do not see anything good to prohibit other to do what THEY want and to organize their subcommunity who has own understanding. Live and let live.
And I'm not agree that it will be a black list. A LOT of people backstab and treat it normal. So it defenetely can't lead to obstruction of some players. We need all of them - both backstabbing and not. And, if you want to play in unexpected manner - login from new account.