I saw this on another site and it gave the address of the house. If you look it up on Google earth, it appears the guy has a truck load of vehicles stashed in the trees around his house as well as the ones lined up neatly outside his shop.
It appears you can't see any of them from the road (thanks Street View). I'm of the opinion that if you can't see them without accessing the property, they aren't there. I would have issues with drones flying over my property to look for zoning issues too. Shooting them down though I believe to be a federal offense as others have mentioned.