I have noticed this bizarre thing, that so many nudists, or people who claim to be nudists, still wear shoes. It never made any sense to me, and I recently, through the SBL listserve, found an article that points out a prime example of how silly it is. Read Nude Men—But Not Really.
I find it silly enough that people wear shoes on a nice sandy beach, on a hot sunny day. They are wusses.