Are drones not scary enough for you yet? How about this? A drone helicopter that spots you and identifies you as an intruder. It tells you to stop and put your hands behind your head. Instead, you keep coming. The drone then shoots you with barbed Taser darts that pump 80,000 volts into you. If you try to get up, it will continue pumping voltage into you until you submit and the authorities arrive.
I think someone mentioned a revolution?