The clothing optional beaches I have visited have been among the cleanest and tamest beaches I know.
You hit the nail squarely on the head. There is nothing wrong with nudity when you consider everything has it's proper place.
I have no problem with nudity, so long as it is voluntary for folks to look at.
A nude beach with a sign right before you walk over a sand dune is ideal. You should have every right to get naked and I should have every right to not look at you if that is my decision.
Think about it, would you want a 450 pound woman to bend over in front of you when you are eating dinner?