I had an encounter with a truly world class Captain Bonehead this weekend.

I was cruising at dead slow about 75 ft from shore, trying to stay out of the way of the tubers/skiers/wakeboarders using the area, and one idiot cut between me and shore pulling a slalom skier.

Absolutely unbelievable.
I'd suggest that the MP put out a whole lot more 150 ft. markers, but they'd probably just get run over...
By the way, I can't take credit for the expression Captain Bonehead - but it seems appropriate so I use it (on a family forum - I have other names for him in private!)
Silver Duck