Those are the type of boaters that I usually "think" just don't understand that their actions may not be prudent. Not a dangerous Bonehead per se. Many boaters don't realize what their own wake does, both on shore and on the water. Granted, they have to contend with wakes as any boater does, so they Should know. I don't necessarily assume that everyone's a seasoned boater and understands all of their actions. Some are newbies, and operate as they would in a car.
I know most people are afraid to get involved in altercations, society being what it can be today. But a simple warning that he could have a seriously expensive ticket in a highly patrolled area may make him think you're just looking out for his wallet
Regardless of whether they patrol it or not