first, "the secret to pollution is dilution". so essentially, on our larger resevoirs there is zero damage. on a small lake you will have a tiny die-off of microorganism because of the pH spike. fact of the matter is, it doesn't hurt the lake as long as it is only the folks who are enjoying the lake.(pipe it in from home and that's a whole different story) as far as legality, heck, on LOZ there is no law about wearing clothes at all, so the only thing they could get you for is a "lewd and lescivious" ticket. and don't forget, in MO, peeing in public is not only illegal, it makes you go on that permanent "sex offender list". (the really really bad list that you want to check before you move into a neighborhood)
i will still pee in the water as long as their is no one around. if someone is around, i park and head into the woods a few feet. like almost everything else, be heads up about the whole thing and everybody will be fine.
"We abuse land because we regard it as a commodity belonging to us. When we see land as a community to which we belong, we may begin to use it with love and respect"
-Aldo Leopold