It may be helpful to understand the perspective of these regulations which is we may own land but we do not own the living creatures of the wild on that land. The ones that can come and go as they please do so but even those than can not are viewed the same. Of course they know that if you own both sides of a stream that has Brooke trout you could harvest them and there simply isn't a lot they can do about it. In that case, the regulations are there to help provide a guide line. I would also assume those regulations can help protect you if you or they catch someone fishing or hunting on your property.