Cheater - def. One who acts in a dishonest (unable to be trusted) manner in order to get what they want.
Seems appropriate in the case of defectors/spys, and therefore anyone acting upon information obtained from same.
Just give us a firing squad so we can eliminate those found engaging in such practices. Hell, we'll even execute the ones taking the CV's off map. Why not? I'm sure more than one fellow has met his end for 'cowardly action in time of war.' Give them a few minutes leeway, so they can correct waypoints mistakenly laid.
Uh, along the same lines; it sure would be nice to get napalm, so we could flame (heh) the bastages transmitting information from their parachutes on the ground. <G>