So to stop people from vandalizing his property he cuts off all access to the beach by everyone.  Seems like shooting a fly with a cannon.  Public access to the beach is part of the public trust.  I bet the "lane" was put there for that access by Bishop Estate.  If the homeowner is concerned about vandals then he should augment the fence around his property and not block public access.  A big thorny bush around his property would probably solve a lot of his problems.  If you go down the beach access lanes in kahala the walls (not fences) are 8 feet high and have dense foliage.