A number of people, independently, seem to have hit on variants of a technological fix to stop skyjackings using off-the-shelf components and existing technologies, e.g. GPS and autopilot. Under sufficient threat, the ability to fly the plane using cockpit controls would be disabled by the press of a panic button. The plane could then only be flown remotely by a ground controller. Great, except planes are not the terrorists’ only option, of course. Let’s have panic buttons activating remote control everywhere.