Austupaio said:let's say Wheem as another libertarian (just using your name as an example, I'm not putting words in your mouth nor implying how you would behave) didn't agree or didn't participate in this discussion.
He decides that it is his right to beat the crap out of the naked person. So, in a bid to protect his children (from looking at genitals, ono), he's attacking this person in the street. Let's say there are no by-standers/by-standers-who-care-to-intervene and Wheem kills the naked person, intentionally or unintentionally.
There are no police, nor any responsible citizens to punish Wheem's murder. Is this a just society?
Anarcho-capitalist is not a society without rules. It's just that the rules are ultimately made (and enforced) by the owners of (real) property instead of (in theory) consensus of citizens.
Whether or not imaginary Wheem would be punished would depend on what the "laws" of the owner of the street were. And whether or not he would be able to catch Wheem before he ran away from his property. Pretty much exactly just like whether or not you go to prison in a country depends on whether or not the country criminalizes that behavior and on whether you manage to run to Mexico before they catch you.
An anarcho-capitalist society would (or at least could) be just the same as what we have now. Police, army, navy, NSA, mandatory health insurance, whatever. The only difference would be that those things would be legitimized not by some mythical political will of "the people" but by the decision of the property owner(s).