We already have irresponsible over use of drones and so far all we have are ones that can fly around and drop bombs on people. And the government goes to great lengths to make sure people are totally emotionally uninvolved in the decision and execution. Once these end up in the military it'll only be a short while before they also end up on our police force. You think the cops are bad now? Wait until they've got a small army of drones to do their bidding. It's entirely possible that that never comes to pass but the US' current direction doesn't instil a ton of confidence.