In reality, the difference between objective law enforcement based on rule of law and anarchy in a small community is demonstrated by lynch mobs. It's lovely to think that people don't need someone like a local law enforcement officer, but someone with legal authority to counter mob mentality is for the benefit of the accused. Mobs don't care about evidence or the law or circumstances. Localized collective violence is the term.
I've seen this a couple times around Africa. Zambia's "flying coffin" is an ideomotor effect where sometime gets killed because "the body points to who killed them."
Plenty of examples. Women accused of witchcraft. Lynchings. Necklacing. If you search for the word mob and "burned alive" you'll find examples from every continent of localized collective violence.
Intentional communities aren't immune from this.
In fact, I had an in-law that had to leave an intentional community they lived in for decades because no one was willing to address a member that was sexually abusing children. The collective violence was being unwilling to act.