I think this is frankly the obvious consequence of the FAA inventing authority to allow commercial drone operations at low altitude (by "invented" I mean completely ignoring the precedent of United States v. Causby which establishes ownership of some airspace above one's property). Commercial drones are flying around at low altitude not because they should, but because they cannot safely share the airspace with other existing airspace users.
The solution here is not more NOTAMs or specific hazard detection; the solution is having commercial drones get the hell out of other people's property (i.e. very low altitudes) and safely share the rest of the airspace with existing users.
The solution here is not more NOTAMs or specific hazard detection; the solution is having commercial drones get the hell out of other people's property (i.e. very low altitudes) and safely share the rest of the airspace with existing users.