They just passed a law in SC that you can't come within 100' of a dock fishing and 200' on a jet ski. That was today.
This may be possible on a state waterway but it would take an act of congress at the federal level to do so on a COE lake or federal waterway. I would almost bet it won't stand up to the scrutiny of the courts. There is no right to privacy in a public place anywhere in the United States regardless of what local and state laws say otherwise. If you do not want someone within 200 feet of your property you better dang well have a title to at least 200 feet of your property and any public property.
So I just read the new law and it says that a boat underway must be 100 feet from a dock and a wakeboat engaged in wake surfing must be 200 feet away. Underway means not anchored or made fast (tied off) and moving BUT not under power. If you are using a trolling motor you are making way, not under way. Way means there is enough movement of the boat across the surface of the water to make the rudder useable but if you are under any kind of power, outboard, trolling motor, oar or sail, you are not under way you are making way. The state of South Carolina may not be aware of the difference, it is an easy bet to make that most enforcement officials are not, but the coast guard is for certain aware of the difference and it would not take a great lawyer to make that point abundantly clear....if you are drifting without any kind of propulsion you would be in violation if you are 100 feet from a dock. If you are under power of any kind the law, as written, does not apply. It won't stand up to the scrutiny of the courts. Many people will no doubt pay the piddling fine the state imposes but someone will challenge it and they will eventually win.