It's worth noting that the Zapatistas aren't an anarchist group and make no claim to being one. They do have a non-centralized leadership structure of elders who enforce a "restorative justice" system that forces people who perpetrate crimes to do community service. This does require a form of tribunal that local leaders manage.

But, to be clear, all this requires hierarchy, authority, and coercion in ways that most anarchists would reject. Which is the core of the issue.