Drones are the same.
Soldiers don't decide when the country goes to war; when we ask them to go we should provide the best equipment we can.
So the question is: why do we not we require an act of congress to do policing? How much 'stability' should our society require?
e.g. Curtis LeMay stated that he thought that had the US lost the war with Japan "he fully expected to be tried for war crimes."
But, yes, that's still an issue, particularly with the US electing not to ratify the Rome Statute.
http://www.amazon.com/Wrong-Enemy-America-Afghanistan-2001-2...
NB I'm certainly not one for prosecuting low level individuals (i.e. the forces actually on the ground) apart from exceptional circumstances (e.g. the Royal Marine who was caught on camera executing a wounded person) but I do have a lot of anger directed at the political and military leaderships in the UK.
That's my favourite spin doctoring of the 21st C: the renaming of "mercenaries" to "contractors".
Most of the contractors we had in Iraq and A-stan weren't doing any fighting. They were people who did things like cooking and driving.