Jamming is easy enough if the drone requires realtime active control, especially if it's on well known frequencies and modulations - but autonomous flight using

Jamming is easy enough if the drone requires realtime active control, especially if it's on well known frequencies and modulations - but autonomous flight using GPS, 9DOF accelerometers/gyros/magnetometers, and computer vision - is all current hobby-grade reality. The main reason those are not (yet?) being used for terror attacks is that the skill level required to pull that off is quite high, and the people planning terror attacks seem to find it easier to recruit suicide bombers than geeks. If any of _these_ guys: http://ardupilot.org/about/team http://ardupilot.org/about/team - got "radicalized", I suspect they'd be very difficult to defend against...