A complete ban on flight within X radius of an airport,
and above a certain height should stop all but criminals from being a nuisance?
A blanket ban will not deter the mentally unbalanced
anyway and penalize a very worthy hobby into the bargain.
I don't believe that delivery drones are more than an extremely limited publicity device, so any legit users like farmers or power companies could get a permit, but a straightforward proximity based rule should at least be tried,
all these little denied options begin to accrue.
IMO
