two years ago i got the news, that south korea is willing to invest x money on guard robots. it had something to do with swarm intelligence and ant algorithm. now an update appeared:

Each Intelligent Surveillance and Security Guard Robot will be equipped with a daylight camera capable of identifying targets within a 4-kilometer radius, and an infra-red night vision camera that has a range of 2 kilometers. While humans can use a joystick and touchscreen to control the robots, they are programmed to respond autonomously when an intruder does not provide a correct password. The robot's responses include sounding an alarm, using non-lethal force, or firing a machine gun or rifle; these would be the world's first robots with such capabilities. | ethics dilemma in killer bots

the dilemma: what if they sell it to private costumers, who is responsible for "un"-intended side effets, ...