Well , i don't know if that was already discussed around here , but i ask you, if there is a puclic alliance between two plyers, shouldn't they anyway figght each other when it's reached a limit?.
i mean, i've seen gamess ( mainly in a friend of mine's game) in which the alliance are public but one of the allied showed no resistant to the partner, and just delivered him them game by keeping attacking the others while his partner already had half map ( and this was in a world 2.1 game!) .... is it allowed? shouldn't it be considered cheating?