I wouldn't, I'm shy, I like to spend time naked in nature and when there's similar open minded people around, but I don't feel comfortable being naked next to people who aren't friendly or understanding.
Not much. Certainly I wouldn't try to convince anyone to do it. It's not for everyone and it's ok. But I also think humanity, in more general sense, could use a bit more of understanding and forgiveness. Just live and let live. If you don't like it, don't do it, but don't criticize or punish others for things you don't understand.