[oldmanjoe]

To deal with the issues of landing Amazon Prime Air would best be served by sending you a plastic "landing square" when you subscribe so that you designate the place in your garden so that the Drone knows where to land and you can keep an eye on it. With an iBeacon built into it it can guide the drone landing and even use IR to warn the drone of nearby movement/people. This would also serve as a signal to members of the public that it is a potential landing zone (perhaps with a red flashing light when a drone is making a land).

Amazon could even give you a discount if you allow the drone to recharge at your landing point.