Defense could quite practically be a mostly light weight housing that could take a hit or two, and using ducted fans because they're safer and give real good pe

Defense could quite practically be a mostly light weight housing that could take a hit or two, and using ducted fans because they're safer and give real good performance. I also imagine that a drone would have a set of cameras for dealing with the hazards of delivery, and would be programmed to avoid people in general, so it would be rare that you could get into a situation where a drone could be stolen.