Here in Florida we have many "no wake" zones as well as Manatees and Dolphins who could get hurt should a boater exceed the posted speed limits, so I'm glad there is law enforcement to help protect our natural resources.
There are also plenty of areas where boats can open things up if they wish to do so.
There's also no shortage of drunks who own boats here, thus the never ending opportunities for our maritime laws to be enforced.
And it's not just the Coast Guard. Its the Sheriff's Dept., Marine Patrol, FWC, plus FDNR.