In short, the NYU/Stanford study concludes the U.S. is committing war crimes in the use of drones. The U.S. military kills, by their own estimates, 49 civilians for every 1 "militant." By the way, they define militant as a military-aged male (p. 6). I searched and couldn't find a firm definition from the U.S. government on the ages that constitute military age outside the U.S. borders, but 15-35 seems to be consensus.
And I'm alarmed drones are being used by U.S. military and police within the United States because what they do over there they'll do over here. In March 2012 interview FBI Director Mueller does not deny that the U.S. President has the right to assassinate Americans in the United States. (This is an expansion on the already admitted White House claimed authority to assassinate Americans overseas.)
The 2012 National Defense Authorization Act declares the United States to be a battleground. As such, it allows for the indefinite detention of Americans. And assassination of Americans. And if you're too close to a military-aged male and get killed, your family & friends can be consoled by the fact that you probably had it coming, as you were in the continuum of criminality, so speaketh Alan Dershowitz.