Seriously, this is insanity.
One day soon they'll be able to track someone from birth to death, in realtime.
There are obvious concerns about the the use of drones by law enforcement, etc., but those can and should be dealt with separately. You don't control abusive surveillance by banning technologies, whether that be drones or cameras or microphones or GPS radios or whatever. You control abusive surveillance by banning particular uses of those technologies, particularly by the state.
There is zero overhead to running 1000 drones over a city once they get the technology right. Neighbors will be spying on neighbors in every detail.
Good luck closing the door on privacy once it's blasted open like this.
If not by straight out hiring them, they will just subpoena for their data.