They would probably just go find food. Hunt/gather and share as a community because that is the philosophy that Burning Man brings.
lol I thought it was in the desert. I'm saying introduce actual scarcity so people have to start deciding between altruism and personal survival. You'll get a few "criminals", then...
Obviously if you put people in a situation where they have no food or water they are going to start fighting. Law enforcement or anarchy doesn’t matter. Survival can become savage.
Not necessarily starvation level famine, just enough scarcity that there are winners and losers in food production which means inequality. You'll have a government in no time.