They just need to make it more sensitive. Then just turn your head up/down/left/right. Your eyes remain on the screen. Looks like right now they have to move their eyes so much this method doesn't work very well.
If someone throws that car at you into your property without you asking for it I expect you can do pretty much whatever you want with it. I would assume they were giving you the car if they threw it at you and included the keys.
Hows that for a car/electronics analogy. :)
Why are people talking abvout batteries on this one. The LED traffic lights are still powered by mains, aren't they? Add a temp sensor along with a simple defroster like on your cars rear window and forget about it.