My understanding was that there is no 'rule' per se that governs treaties/pacts etc, its up to the player to trust the other party. Of course, any broken NAP should be made public so that the offender's reputation is tarnished, but I've always found the capacity to backstab is what makes diplomacy in multiplayer games potentially so exciting. I'm always too proud of my reputation to do it, but it always adds spice to a game when it happens
