I find the whole concept rather concerning; 5-pound payloads buzzing around the skies. Safety for those underneath, along with collision avoidance with other moving objects has to be of prime concern. Oh, and did I mention the noise aspect!
I think Bezos has totally lost his mind. This will never happen. Even the DOD has to test UAVs in strictly designated area, which primarily exist in the middle of the desert. When they go outside that, they have to get all kinds of clearances ahead of time. And that's for multi million dollar aircraft, flown at tens of thousands of feet, by trained pilots.
I'd like to see the data on the increased chances of insanity, as you become more and more rich. There seems to be a correlation.