Wow, I had this exact same thing happen to me last spring!
I know exactly who the old (grumpy) fart is that comes storming out, pretending he owns the city!
He came out and literally swore at my buddy and I "Hey.... balh, blah, blah, you're not allowed to fish in the harbour."
We (pretty bluntly) said we could, and to leave us alone. He then threatened the cops on us, to which we also replied to feel free and go call. (He never did).
But he then proceeded to go to the launch and LOCK it, so we couldn't get out.
We then proceeded into the office, and confronted this old fart, to which he crumbled like a soda cracker, and just said that we owed the launch fee, LOL.
GOOD JOB RON.... I will def be fishing there in the very near future, with a big on my face!