Perhaps the RAF is better than the USAF at droning, but a recent investigation into the situation in Pakistan revealed that the strikes are targeted by mere pattern analysis, looking for groups of people that *may* be targets in a country that they are not at war with, against a people that has never attacked them. Around 25% of the casualties are civilians, including women and children. Just 2% of the casualties are suspected of being high profile targets.
These drones hover above neighbourhoods for days, terrorising people until they are afraid to go to school, work, to weddings or funerals for fear that some computer program somewhere will find their movements suspicious and lob a missile at them, wait a bit, then lob a missile at anyone trying to aid survivors.
America is now a terrorist nation, at the very least to the ordinary people of Pakistan. They flout international law, arbitrarily slaughter thousands of people and get away with it through shear audacity. Drones and their repercussions are pretty seriously terrifying - if this sort of continuous terrorism was happening in the States... well, things would get pretty hilariously hypocritical pretty freaking fast.
So yeah, sit there telling yourself about all your careful rules of engagement and target selection, but that just further distances yourself from the reality of what is happening when you pick up that control and fly your war machine over a nation that has no quarrel with you.
EDIT: source [http://www.guardian.co.uk/world/2012/sep/25/drone-attacks-pakistan-counterproductive-report]