That's where your knowledge falls short. It is not trespassing to float on a public waterway. If you actually read this article it gives you enough information for you to fact check what so many of us already know, which is that this is a public waterway, open to any member of the public. 

Are you really calling the writer "entitled?" 

Pause to refect who is exhibiting an attitude of entitlement. 

Hint: It's you.