It begs me to wonder....
1. Won't theft of packages run rampant or Amazon only will deploy drones to customers currently home?
2. Wouldn't the drones be subject to be shot or brought down?
3. Will this only fly in good weather?
4. The sky is going to be littered with these things flying around?
5. Will there be a service where you can rent a drone to spy on your mate? Divorce lawyers could sell it.
1. Won't theft run rampant if UPS drops off your package at your door when you're not home?
2. Don't drivers of cars and trucks risk getting shot or stopped?
3. Will cars and trucks travel only in good weather?
4. The highways are going to be littered with cars and trucks driving around? Won't this lead to "traffic jams"?
5. Will there be a service where you can rent a car (or taxi) to spy on your mate?
I'm not trying to be glib, but rephrasing the questions like this puts the issues in a new light. You can see the potential problems and solutions.
Although you'd have to be a pretty stupid adulterer to get caught by a noisy drone while cheating. That may just be a tautology.
On (5) for enough money you could probably already do this. Paparazzi photographers have already started using drones in the EU and US.