Maybe security UAVs could be an answer?
If an unknown drone appears over a nuclear power plant, the plant could launch a UAV to follow it about until it goes home, watch who picks it up after it lands, and then just send in the police.
If an unknown drone appears over a nuclear power plant, the plant could launch a UAV to follow it about until it goes home, watch who picks it up after it lands, and then just send in the police.
In addition, the toy helicopter would not be easy to see on radar, especially if it were to fly close to the ground.
With radio triangulation that should be able to pinpoint the controller. I know most of the newer control equipment is using spread spectrum and frequency hopping, but I imagine that is a solvable issue.
As for the misdirection, using cellular relay devices is something most wouldn't do and even if they did it would provide a lead that could be followed.
When the village of Laerdalsoyri burnt down in Norway in January the emergency services had to ground their own fire fighting helicopters because news drones were a hazard:
> police told Norwegian newspaper VG that a helicopter was being delayed because of suspected media drones taking pictures in the area.
> "It is important for us to stress that if someone is using drones, they must get them out of there," police spokesman Nils Erik Eggen said.
> "This could create a hazardous situation and may pose a danger to helicopters."
> The police could not say how many drones had been operating in the area.
So one could imagine a movie plot terrorist attack where unarmed drones fly over an airport and cause a total shutdown, or in the blockbuster version actually try and intercept a landing airliner.