Naturist Yoga, as I call it, is about the yoga. My classes are clothing optional, so there is no requirement to be nude, but there is a requirement to be respectful of others and their space. We are here for the benefits of experiencing yoga without any restrictions of movement, and also the improved sense of self-esteem we get from being accepted and respected for who we are as a whole person.
In the four years that I have been teaching this class, there has never been a problem. Each person who attends must agree to some simple rules and guidelines for the class - which help to both ensure that people understand the style and purpose of the class, and to deter those that have inappropriate motives.