You cannot take the law into your own hands, Anarchists
If you’ve studied Natural Law, you’ll understand that there are certain ‘requirements’ for bringing about a harmonic condition in your community. There will be certain principles that if you adhere to, you’ll be fine, but adhering to others or breaking those required principles will bring about self-destructive patterns or self sabotaging effects.
One of those will be the simple idea that when we engage in interactions with other human beings, make decisions, take actions etc. we run the risk of breaching their individual rights, creating harm or loss in some way. By the very nature that we are interacting with others means that the judgement of any potential wrong-doing cannot merely be our own. How would that be fair? That is surely the principle that you cannot merely expect others that your ‘self-mastery’ as you see it, will never cause you to transgress upon others. You can’t expect others in the community to say ‘OK well we won’t ever need to be the judge of your wrong-doing because we know that you are a voluntarist and therefore you are impeccable at doing that for yourself and being 100% honest internally.’ Clearly that couldn’t be the case.
Therefore, community judgement has to be the result when humans have relationships. Resolving differences can be done between two individuals (which is the best of course), but if that doesn’t work, then naturally it must follow that the a community tribunal must ensue.
Some anarchists argue that private law societies and agencies can get involved in this situation - which I would vehemently disagree with, for the simple reason that that will also lead to the breaking of Natural Law principles and requirements - and therefore result in chaos. If you want to know the reasons why, I would recommend reading this…
…which is a critique of Hans Hermann Hoppe talking about Law Societies. Very dangerous place to go as it will lead us to breaking Natural Law at the other end of the problem - which is ‘Call out wrong-doing’. It leads to justification, normalising, denial of crime and wrong-doing.
All of this requires a deep dive into Natural Law principles and checking that at every stage of the extrapolation of ideas for how a community functions, it is always in alignment with those principles at the foundational level.