You won't answer the simple question because it destroys your false premises.
Question: How can anarchists prevent competing factions from forming?
Answer: You can't.
Therefore there will always be some form of enforced "law" or dictate, even if only at a localized level. It's all about force. Government is force. You cannot eliminate force. Nor free will/choice.
If individuals voluntarily form factions, they may choose to set up their own rules. Laws. And Enforce those laws. Enforced Laws = Government.
So you shouldn't be concerned about the inevitable use of force, but whether it is Moral/Just or not, and whether you have the greater force or not.
PEOPLE OPPOSING TYRANNY - Real Grass Roots!
Are you a POT or a PET - Person Embracing Tyranny?