I think you’re fundamentally misunderstanding that social relationships to harm are fundamentally changed under conditions of anarchy. I apologize for the misunderstanding as writing on obscure forums doesn’t exactly encourage me to write with vigor.

Of course there would be a plurality of violence under conditions of anarchy, but this does not fundamentally mean the rule of vigilantism. Right now, people have been dealing with harm without the state for generations. These are found in criminalized communities like Black and Indigenous people, people who use drugs, people who engage in sex work, etc. These people develop mechanisms by which to deal with harm without the state and oftentimes without engaging in vigilantism. For these people, vigilantism is not a court of first resort but a last resort. Vigilantism puts a target on their back from the state. Instead, they talk it out, develop safety plans, plan boycotts and bans, etc.

Rather than thinking of justice in anarchic terms as vigilantism, think of it in terms of people dealing with harm and conflict in healthy ways.