And what about signal jamming or drones being shot down? Not only for package theft, also to strip or steal the drones themselves? I'm really curious how robust this delivery method is against external manipulation and general human misbehavior. Or say there's a defect - some structural damage - and a drone crashes or loses its 10 kg package into a front screen of a car driving on the interstate. Honestly, I don't see a way this could work. Not because delivery by drone in densely populated areas is economically and technically unsound. Because of... other stuff.