OTOH, it seems to me that townships, cities, counties and states should start purhasing anti-drone drones, to protect against the fed. gov't. Basically, an anti-drone drone would be a simple, cheap drone that could, perhaps, get itself ingested into the engine of a drone, causing the drone to fail. If it misses, no big deal, just fly it back to base.
If it gets sucked into the drone and disables it, the pilot would be able to glide the drone to a safe landing, somewhere that it can be recovered. After enough drones need new engines, maybe the Fed will get the hint that we're not going to tolerate this invasion of privacy.