Mandatory Boater Education results in people attending a class (and usually the shortest one allowed!) barely passing the exam, then sitting back and feeling that they now know EVERYTHING that they will ever need to know (no need to ever take another course!). I have taught courses in Rhode Island where the course is mandatory for anyone operating a boat if they were born since January 1, 1986, and everyone operating a PWC (regardless of age). Although most students did take hte course seriously (mostly the ones that were taking it because they WANTED to, not because the DEM told them to), far too many were only there to get that certificate and ID Card, and often barely scored the minimum passing grade, then tossed the textbook in hte trash as they left the classroom.
I have taken the 12-Lesson USPS course (1987), the 13-lesson USCGAUX course (1989), and taught the 6-lesson and 13-lesson USCGAUX courses as well as the ABC (America's Boating Course) and ABS (About Boating Safely, basically same as ABC) and the Massachusetts State Boating Course far too many times to give a record of how many times I have taught them........ and you know what? I still find that I learn (or am reminded of) something EVERY time that I teach!
Where I sail there was a controversy this Spring as the USCG was talking about removing several buoys marking harbor channel. The local Harbormaster successfully fought the move, but I disagree with his reasoning.... he claimed that this action would result in mass strandings of boats since hteir operators would no longer know where hte channel was. Well, with the exception of one buoy marking a shoal, the rest of the channel is pretty easy to follow, especially if you use a chart (or chartplotter), and most sailors would certainly realize that the channel leads right between the lines of moorings...... also, most of the powerboats draw less than 2' of water, plenty of depth even outside hte channel for them. Truth is, I don't think there would be that many goundings.... but without the buoys there would be a constant problem of powerboaters wandering aimlessly around hte harbor, unsure how to get in or out since the "road" was no longer marked! 90% or more of the powerboats follow hte channel buoy to buoy coming in and out (even making lengthy "detours" to do so instead of running straight out to open water) even forcing deep draft vessels to alter course to avoid them. Most sailboats sail everywhere EXCEPT the channel and few ever run aground! Go figure!