f2shooter said:
A number of cities have outlawed drone use in their jurisdiction and that usually includes use by law enforcement.
IMHO such regulations are sure to eventually run afoul of the Feds. There is court precedent;
City of Burbank v. Lockheed Air Terminal Inc. (1973) held that a municipality may not prohibit aviation operations conducted in accordance with FAA regulations, and
International Aerobatics Club Chapter 1 et al v. City of Morris, Illinois (2014) recently held that this precedent clearly applies to aviation conducted for nominally recreational purposes.
f2shooter said:
The FAA holds the position that it controls all airspace in the US from ground level up no matter whose land is involved.
True, and this is codified in 49 USC § 40103(a)(1).
The United States Government has exclusive sovereignty of airspace of the United States.
This strongly implies that the federal government intends to occupy the field of aviation regulation within (and over) the United States (field preemption). However, as discussed at length in the CRS report that I linked earlier, prevention of trespassing and invasions of privacy has traditionally been within the powers of the states, and the proverbial granddaddy of court precedents involving airspace in the U.S.—
United States v. Causby (1946)—held that the federal government's sovereignty over airspace is NOT unlimited.
Although the case effectively nullified the common-law doctrine that property extends indefinitely upwards, it simultaneously held that a property owner retains rights to the airspace necessary for "full enjoyment" of the land, extending to the "immediate reaches of the enveloping atmosphere." However, Causby did NOT establish a definitive altitude or horizontal distance limit, nor any other "bright line" definition of where federal sovereignty ends and private property rights begin.
As it relates to the court case discussed here, the
Restatement of Torts (Second)—widely relied upon in state courts for general principles of common law—states in § 159(2):
Flight by aircraft in the air space above the land of another is a trespass if, but only if, (a) it enters into the immediate reaches of the air space next to the land, and (b) it interferes substantially with the other’s use and enjoyment of his land.
It can certainly be argued that a low-altitude drone flight over someone else's property constitutes trespassing under this definition. Ergo, it is arguably also appropriate for the property owner to use a legally prudent level of force to stop the trespass.
This issue will surely have to be hashed out in the courts in the coming years.
Here's another discussion of airspace rights and drone flights that I found on the Interwebz:
https://www.bu.edu/bulawreview/files/2015/02/RULE.pdf