As a rule I am against any more meddling of the government within my (our) affairs. A little bit of regulation has a habit of becoming a lot of regulation. The anti smoking crowd has mastered the art of getting just a little bit of what they want year after year and before you know it more rights are gone.
BUT.....there are so many asswipes on the water that licensing might help to eliminate that problem. It might. But I would imagine that the gov will just use this as an excuse to get us off the water, or as another way to tax us for nothing in return.