Droning is essentially about taking out any person (or structure, building, power line etc) that the owner of the drones deems to be bound up with terrorist purposes, or just finds it useful for other reasons (propaganda, inciting terror, creating spin etc) to get rid of. There is no transparency and no requirement to try to find out who or what the powers-that-be are really striking at. If the drone is aimed at, and strikes, a school and fifty innocent people perish, it's very unlikely that there would be any military inquiry into why the school was hit. Because somebody claimed that it was associated with a movement claimed to be a terrorist network? Because some terrorists were supposed to be hiding there? Or just to create fear and demoralize the locals? I don't see how any discussion would be happening over those questions, nor any military inquiry, unless vital facts are retrieved by the work of civilians on the spot and perhaps by strenuous, intelligent and honest reporters - and that breed does not have a huge backing among today's news media. Also, as any effort to recover the truth about a "dirty attack" of this kind would likely have to rely on the locals and perhaps on persons from an armed force having the allegiance of those local folks, and which force/army was the ultimate butt of the bombing campaign, the coverage would then be easy to pass off, for the instigator power (the US, in today's world) as "the lies of the enemy".
I can see why droning looks convenient and sometimes necessary to fight a stealthy and often non-uniformed enemy in a country that is poorly known or mapped, but it often does involve both violation of the territorial rights of countries whose governments one is not fighting, and real gross disregard for human life - just dropping bombs and missiles at whatever you think is the right goal. And by extension, it carries considerable risks of
*leading to war crimes and rogue killings
* giving an excuse for retaliation by the other side (propaganda value to your enemy)
*destabilizing an ally by doing much more on their soil and in their airspace than one really had a deal to do. (example: Pakistan)
*demoralizing one's own armed forces, and even more, the home front, if rogue attacks and cover-up become known (as during the Vietnam war, with the abusive warfare, gang rapes, fire bombings and killings back then).
It's a very troublesome tactic and if it continues, other major powers (Russia, China, india, perhaps even Iran) will soon be trying their hands at their own drone systems - and using the same kind of excuses as the U.S. is bandying about now.