First problem with these drones is air rights. Currently the FAA requires aircraft to remain 1000 feet above ground over densely populated areas. To deliver packages with drones, you are going to have to fly much closer to the ground, and go over several peoples' properties. And I hate to sound like some hothead, but if one of those comes over my property, a shotgun or baseball bat will be used to remedy the intrusion on my property.
Someone delivering a package from the USPS/UPS/FedEx is not considered a trespasser when walking on sidewalks of neighbors to get to the delivery address. However, someone violating air rights with a drone will be trespassing on your property, and you have the right to take action deemed necessary to protect your property.
I’m comparing the logistical difficulties of having a constant presence of dozens of armed drones in the air being flown on the other side of the planet as the operators to to the logistical difficulties or much more short term flight of unarmed drones probably being controlled by a guy in the same city.
You misread the FAA reqs. Aircraft have to remain 1000 ft above the ground. Drones are NOT aircraft. They’re RC planes, any idiot can buy one and fly it RIGHT NOW. You actually need to keep those BELOW 1000 ft so they don’t present a problem to aircraft. Depending on the quantity of teens in your neighborhood you probably already have drones flying over your property. http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=drone
If the drone is delivering a package to you it’s got just as much right to be there as the UPS guy. You have functionally invited them. And again, you probably already have drones flying over your place, and you don’t even notice.