Here is an interesting article on the use of Drones in the war on terrorism, by Mr Adam Elkus. The title is "Weapons Don’t Make War".
A thing to keep in mind about the use of Drones to do our fighting is that the other side will, eventually, figure a way around our actions. Just as after we hardened our bases in the Middle East, and our Embassy's, we found terrorists coming here, so too those who are bothered by drone attacks will find ways to go after us in an asymmetric way. It is the nature of war.
As the economists keep telling us, there is no free lunch.
Regards — Cliff