Also consider railroad tracks, at least normally you'd only have one property owner making claims (the railroad), and the local residents are already used to 90

Also consider railroad tracks, at least normally you'd only have one property owner making claims (the railroad), and the local residents are already used to 9000 HP worth of coal train rumbling thru at 3am so a tiny little quiet drone is no real issue. Also in an accident, I think its pretty obvious who "wins" when a ten million pound train hits a ten pound drone, so other than glass and paint claims I think you're pretty safe. I don't envision a drone ever causing a coal train to derail, LOL.