Big Brother is already using drones to spy on everyone:
Sgt. Douglas Iketani acknowledges that his agency hid the experiment to avoid public opposition. “This system was kind of kept confidential from everybody in the public,”he said. “A lot of people do have a problem with the eye in the sky, the Big Brother, so to mitigate those kinds of complaints we basically kept it pretty hush hush.”
Stupid Fourth Amendment, particularly describing the place to be searched.
Seriously, the part in question is the “unreasonable” criteria. But if you think that if you told the public (“To Protect and Serve”, it says on the side of the car that almost hit me this morning), they'd be opposed, that pretty much answers the “is it reasonable” question. It's not.