content: Aren't most drones programmed to descend slowly to the ground when they run low on battery? Wouldn't it be likely they would do the same thing if they lost both the controller signal and GPS signal and couldn't return home? And at least for airports the threat isn't so much some organization taking aerial footage with a sophisticated custom built drone but rather some dummy that just picked up their new toy and decided to fly into the approach path of a near by airport and create a hazard to aviation. (although this device may create a hazard to aviation on its own) The video also mentions people flying contraband into prisons, I don't know how common this is but again it would probably be done with cheap off the shelf units. Edit: After doing 60 seconds of research Battelle is a 86 year old $6 billion company, who knows how far along in development this idea is and whether it will ever make it to mass production but chances are if they are making a public promo video of it they have spend the time and money to research if the basic concepts behind it will work. This isn't one engineer with a half baked idea and a kick starter campaign.