I'd be more concerned about something like this robotic machine gun, which is designed to do nothing but kill humans efficiently:

http://www.ubergizmo.com/2014/09/samsung-sgr-a1-robot-sentry... "$200,000, all weather, 5.56 mm robotic machine gun also sports an optional grenade launcher... identify and shoot a target automatically from over two miles away... robot will not distinguish between friend or foe..."