People might make jokes about the costumes and nudity at Burning Man, but it's actually written into the event's principles. One of the principles is "radical self-expression, which the website defines as "rising from the unique gifts of the individual... Participants at the Burning Man event in the Black Rock Desert are encouraged to express themselves in a number of ways through various art forms and projects. The event is clothing-optional and public nudity is common, though not practiced by the majority."
Along these lines, another principle is participation, meaning that people are heavily encouraged to engage in the activities of the festival rather than observe them or appropriate them for their social media. "Our community is committed to a radically participatory ethic," the committee writes. "We believe that transformative change, whether in the individual or in society, can occur only through the medium of deeply personal participation. We achieve being through doing. Everyone is invited to work. Everyone is invited to play."