Have they even considered the possibility of a 150 pound Great Pyrenees biting the “intruder” and hanging onto it? How about a duplex with a shared, fenced yard? Unit A orders a package from Amazon - drone has a right to be there. Unit B owns a Chihuahua- dog has a right to be there. Dog bites drone, is carried a few hundred feet up, falls, and is seriously injured. Resident of Unit B (who didn’t order the package, so Amazon can’t hide behind a disclaimer in the contract) sues Amazon for the vet bills - and their lawyer introduces as evidence a news story about the Great Pyrenees incident a year earlier, which proves that Amazon knew that dogs would bite the “drop drones”.