Here is a solution. Here in Oregon you have to have a power boat license to operate a power boat with 10 horsepower or more. You have to pass a test to get it. I think the license is a great idea. The test is fairly easy to pass. I feel the test should cover more, Like the rules of the road. I also think there should be a seperate test if you are going to use the boat on a river. I also feel the any and every boater should have to have a license, Including sail and row boats. make the license harder to get by making people take a class. Have the test cover boating ethics as well as safetey and navigation. This would educate people and keep a lot of doughballs of the river because there are some people that are too stupid to even walk out on the rivers in boats. Make the license revokable for infractions of safetey and rules of the road violations. I bet that would put a stop to a lot of conflicts.