Reuters reports via Yahoo News the CIA will conduct investigations into several drone strikes that killed hostages held where the strike occurred. Suppose President Wuss announces that we will only conduct drone strikes where we are certain there are no hostages.
If you and I will be aware of that policy, so will the ISIS and al Qaeda leaders. Were I one of them I would grab a couple of U.S. citizens and keep them tethered at my headquarters, making sure they got outside for some "fresh air" everyday. It's a perfect anti-drone system.
Which is exactly why such a policy is nonsense. As Ralph Peters notes below, collateral damage in war is SOP, sad but unavoidable. It should never keep us from attacking enemy command and control personnel.