I can see arguments in favor of licensing; after all, I must have a license to drive, ride a motorcycle, fish, hunt, fly an airplane, glider, helicopter, blimp, or balloon, and some of these activities pose very little danger to other people, compared to boating, especially power boating. The latter five even require regular documented reviews by an FAA instructor. On the other hand, and this is assuredly the dominant hand, I can think of very few areas of my life the government has meddled in that are improved for that meddling. Licenses would just be another 'gotcha' revenue-grab for local constabulary, a way to bully out-of-towners, a way to clog our bogged-down courts with more lawyers and weaseling. We have enough laws, enough licensure (unless we required a stiff history exam and squeaky-clean rap sheet for politicians' licensure. Now THAT I could get behind. If we simply fairly and consistently enforce what we have, the reckless operators will be fined, the ignorant will be forcibly educated, and so forth. We don't need any new layers of bureaucracy, as we can't adequately keep straight what we already have.