as much as i detest mechanized warfare, if dude actually defected to the enemy side and was acting in a combat role (not a medic or other non-com role), then he would have been a legal target.

that being said, drones are a slippery slope to completely removing the human decision making in pulling the trigger to kill someone. eventually, they will have automated targeting on those things, then they'll implement automatic decision making, then they'll implement automatic killing of the target that the drone itself decided was a legitimate target. the problem here is, what are we going to train those drones with? How can we be sure that everyone it kills is actually a combatant?