You can play Call of Duty, if you follow the Geneva Convention?

Recently made news by BoingBoing and MSNBC a parent of a 13 year old gamer said that he was allowed to play Call of Duty as long as he first read the Geneva Convention's Rules of Engagement. After reading those rules the father in the story then instructs his son that he must abide by those rules, and if he or his teammates break one of those rules, the game will be taken away.

Now I am in no means an avid player of Call of Duty, but is this actually possbile to play the game and follow the rules of the Geneva Convention? According to Wikipedia "in any engagement, the ROE need to balance two competing goals: The need to use force effectively to accomplish the mission objectives and the need to aviod unncessary force." Now from what I have seen, the online play of Duty is team vs. team and the goal is to eliminate the other team. I do know that there are also strategic online plays available as well, however for the basic team vs. team, is it possible to follow those Rules of Engagement?