Then we'll see more of these...Another rather tired argument is in regards the 'making money off hauling and selling derelict boats, same as is done with cars.'
Yeah, that's not the way that works.
Hauling a derelict, especially if it's sunken, is quite expensive - we aren't talking about hooking a wrecker up to the boat and driving off. Craft for towing are specialized boats in and of themselves (have a look at a SeaTow boat sometime), and a sunken boat will need a barge and crane and probably a diver, someone's gotta pay for that.
If the owner isn't caring for the boat, he or she isn't about to pay yard fees. They'll just walk away. So then you have a POS taking up valuable boatyard space, so the yards are wanting their fees or else the boat outta there so they can put a paying customer's boat in the space.
There is NO market for POS boats, so the POS boat will just end up cut up and landfilled, further costing money.
So there it is: the derelict laws aren't enforced largely because it is far more expensive to enforce them than to leave the boats derelict. The authorities just hope that nobody complains 'cause they don't want to spend that kind of money to solve the problems...