I don't think we have a lot to fear yet. The extent of unmanned passenger vehicles seems to be airport transit trams and overhead monorails. When trains start becoming automated, then there is an indication our time is limited, but until then, I don't think there is anything to lie awake at night about. Automatic systems don't handle faults/fires/failures well. As for remote control- ask aeromodellers how many models they've lost with signal failures!