Send him a bill for the lease of your property!
I was standing on a public road waiting for my son to hike off a mountain on Friday. A guy drove up and said, "are you supposed to be here?" I recognized the gate at the end of the lane was locked with a no trespass sign on it, but I was in a public land strip. I have no idea who he was, probably letting me know the land behind the gate was posted. I believe in personal property rights-having been in three conflicts with governments that take what they want, I fully support private ownership--but not of public roads. Some people need a glass navel, so they can see where they are going!