You realize that heirarchy is exactly how you enforce rules, correct? You can't enforce rules without heirarchy. Seems to me it's you who has no idea what anarchy is. "no slaves, no masters" doesn't mean people who can arbitrarily enforce "rules."
That's not necessarily true, is it? All participants of an instance or group could practice https://en.wikipedia.org/wiki/Direct_democracy to form and enforce a set of rules without hierarchies. Not saying that's what happened here though...
The only nation state currently that somewhat has a form of direct democracy (Major emphasis on somewhat)- Switzerland- still has absurd hierarchies, some even more so than other countries, where entire cantons can decide who can or cannot move somewhere.