well the concern I am curious about how they address it is, how will they route these drones? How high up do they need to be when crossing private property before they are not trespassing. If any have cameras attached how do we verify they only record where appropriate? if routing down existing roadways how do they fare in areas with large numbers of over head wires?

my personal concerns from above are trespass and privacy. besides someone should easily be able to come up with a means to track them and nab some packages, with drones if there is enough money in it.