Every lake has an owner like that. Last fall, I had a guy screaming threats at me because I was fishing 20 yards in front of his dock, and he didn't want me messing with "his fish." I asked him what his address was. When he asked why, I told him so it would be easier for the police to find his house when I called them if he didn't stop. I agreed to back off his "area" but he had shut his trap, and let me be.