That is my biggest concern too. Let's say they somehow manage to perfect street landing, so that drones won't come crashing down on people, parked cars, constr

That is my biggest concern too. Let's say they somehow manage to perfect street landing, so that drones won't come crashing down on people, parked cars, construction sites etc, independent of weather conditions (snow, ice) - what happens then? Does the drone wait until you go down and pick up your pizza? What would prevent people from stealing a (rather expensive, I imagine) landed drone? Does it just drop the deliverable from a safe distance? So what about "oh hey, there's a hovering drone, let's go pick up some free pizza".