I know that is sort of off topic, but thought I'd throw it out there. Sort of a "don't be a flaming A-hole and use some common sense" (IE don't fly a drone 20 feet over your neighbor's head, but if you are flying a Cessna at 800ft, the property owner can kiss off).
As a guy with his FAA commercial UAV paperwork, I'm very tuned in to this topic. There are a lot of considerations and interpretations that are pretty hand-wavy. But "don't be a jerk" pretty much covers 99% of it. On the other hand, keeping (in my case, a smallish photography/videography drone) over public land (say, along a street) while not being directly over an adjoining house's property isn't enough to prevent many homeowners from getting unhinged. One spends a lot of time educating people. Helps if things start out warm and fuzzy from the get-go. So far, a good track record for me. But then, I've never flown over the MD state house at 400' :-)