“The study concludes that the strikes have killed far more people than the United States has acknowledged, and traumatized many more innocent people. That trauma is destroying a way of life, Emmerson said. ‘The Pashtun tribes of the … area have suffered enormously under the drone campaign.’ And tribal law prescribes revenge for the killing of a tribe member, which serves to radicalize more young men against the United States, he said. Pakistan considers the strikes counterproductive, illegal and a violation of its sovereignty.”
http://www.cnn.com/2013/03/15/world/asia/u-n-drone-objections/index.html