I am quite surprised to learn that dock owners have few rights. Wouldn't it be a kick to appear before the local town's tax assessment group and ask for an easement of taxes due to reduced rights of enjoyment of shore frontage?
I've never had such issues with fishermen crossing or casting from my dock, but to read the responses given from learned posters, I am concerned that I really don't have many rights as a shorefront owner. It would be interesting to see how one of the McMansion owners handled legal trespassers, when push came to shove.