Sure you would, big man. I bet you put your tail between your legs the moment you find that was a fishing or lobstermans mooring you are squatting on.
You would learn it was theirs at 3am with them standing over your bunk. They make their own rules and set their own punishments for violating them.
I'd pay to see that one...
People have been arrested for illegal tress pass for what amounts to stealing the use of a mooring. Have also been prosecuted for theft of services when marina's who use these moorings get boaters who don't pay.. These instances are pretty rare and usually precipitated by attitudes like are shown above...
In the US the States have the rights to the submerged shore land waters and the State gives the power to each town with waterfront to manage it. The Submerged Land Act of 1953 gave the States control of their coastal waters and seabeds. This means it gets complicated when you have 50 states and thousands of towns who manage moorings and their use.
Here in Maine nearly everything is done with moorings. If I had to put a number on it I'd guess that more than 90% of the boats on this coast reside on moorings most all of which are permitted by local towns. Where towns don't manage it they pass the buck to the ACOE for permitting.
With 3000 islands on the coast of Maine we have entire towns who depend on moorings as the lifeblood of their connection to the mainland. Take one of these moorings and pull "attitude" and you're likely to wind up with a few grams of lead in you. Islanders have shot folks for much less.....
Many harbors in the NE have waiting lists and steep annual fees (Falmouth, ME the largest mooring field is $250.00 per year for non-resident + your own gear). I've been on the wait list for Rye Harbor since I was 11 when my mother let both of our family moorings go over a "divorce" pissing match. Unfortunately one of them was MINE, not my fathers... I doubt I will ever get that mooring back in my lifetime. The fees for these moorings are on-top of an annual or bi-annual inspection and mandatory winterization of your gear. It costs me $450.00 per year, on average, to keep my mooring up to snuff in Falmouth and I already own the gear.
The mooring in-front of our home conveyed with "rights" on the deed to our home. We have the "right" to have and keep this mooring as long as we want. This type of stuff is commonplace here in Maine a coast where moorings mean livelihoods and more. We also own to the MLW mark not the MHW mark and this is part of our State constitution. It has been challenged twice and both times failed. This means the beach in front of our home is private to the mean low water making it truly private not just quasi private... Each State does it differently. Maine is quite unique in waterfront dealings..
On top of all that in Falmouth you can non sublet or let someone else use your mooring ball. The harbor master checks regularly. So if a transient grabs my mooring while I am away there is a good chance you'll see an all black RIB with twin 250 HP motors and blue lights coming to pay you a visit before I even get back..
Course you can always do what I did when we lived over in Harpswell and had trouble with people grabbing our ball when we were off sailing.
20 LB MUSHROOM - CAUTION OLD CHAIN
That stopped just about everyone from grabbing our ball...