Drones at 400 feet are quieter than many cars. If you can’t bear the noise of a drone delivering to your house, do you complain at the noise of an actual diesel truck idling on your street?
I think there are a few who are in this business, at least controlling them from distance.
This started happening in my Neighbourhood when some truckers worked out there was a short cut to get to the port, they started screaming down our street at all hours of the night, the law had to put a stop to it.