I will now attempt to address the drones.
"Hello drones, my name is Scourge. How are you? I am fine."
I will now attempt to address the issues with the drones.
"Hello issues, my name is Scourge, and these are drones."
I will now attempt to talk about the issues that have been brought up, regarding drone delivery.
Point 1 - people will shoot them down.
I imagine that they'll be programmed to fly at a certain altitude, say 200-300 ft (100 m) above the ground to be sure to miss all obstacles, until they get to the correct coordinates, then just descend to the landing site. It'd be hard to hit a moving object at that range for the best of marksmen, impossible for your standard guy with a slingshot. Plus, discharging a firearm in a densely populated area is a recipe for getting the cops on you.
Point 2 - The range is too short to effectively serve enough people.
Amazon warehouses tend to be either in or very close to population centers. The market is already right next to the source.
Point 3 - They aren't accurate enough for this sort of thing, how will they get to the correct house?
A smartphone will probably be required to place a drone order. Just walk out to a good landing zone, hit the "right here" button on the order screen, and the drone just uses the GPS coordinates that your phone will send. GPS is generally accurate to within a few feet, so it should be fine. And I'm sure the drone will have sensors/cameras so that it won't try to fly through trees or power lines or something while coming in for a landing. I don't think the option for drone strike will even be available if you don't have a phone you can use for GPS - see below.
Point 4 - How will people know what's available for drone strike?
I imagine it'll be just another shipping option when you check out: Standard, Expedited, Prime, Prime Express, Drone Strike. Click drone and follow the directions.
Point 5 - How will your stuff not get stolen?
You were at the landing site when you placed the order, and you know it'll arrive within 30 minutes. There will be a tracker that sends updates to your phone with real-time status, so you know when to go back outside to pick it up. Drone lands, when you get your phone within 5 or so feet, the drone records that you were there, and leaves your parcel. If it gets shot down or the parcel stolen while it's waiting for you, it's your fault for not being at the landing zone when it arrived.
Point 6 - Too expensive to be viable
At first, yeah drones are expensive. And you'll need maintenance facilities and workers to keep them flying. But it'll still probably be cheaper in the long run than hiring bicycle couriers instead. (Though I'd love to see Amazon bike couriers zipping around, that seems fun).
This was fun! It's interesting thinking of stuff like this, it's a cool thought experiment for now.