They don’t need to get down to 6 feet above your property. Spy satellites can read a car’s license plates from low earth orbit. A surveillance drone can do even better flying along just above the rooftops over your property, and even listen to conversations in the backyard or patio. Should it be legal? That will be determined in subsequent case law, and the courts determination of a “reasonable expectation of privacy.” Until case law catches up with technology, nothing prevents a police drone from buzzing around your property like a common housefly, peering into open windows, or hovering over your pool party.
I think I didn’t explain my point well. If they can fly over us, how low can they go? Meaning, is there a difference between an aircraft flying thousands of feet or only several feet, legally? It was a hypothetical looking at ownership and privacy etc.