Medieval Icelandic crime victims would sell the right to pursue a perpetrator to the highest bidder.
18th century English justice replaced fines with criminals bribing prosecutors to drop cases. Maybe a state-run legal system isn’t a fact of nature, but a historical oddity as contingent as collectivized farming or nationalized railroads.
The exotic anarcho-capitalist part comes in as English civil society creates its own structures to work around these limitations.Merchants, landowners, and other people with wealth banded together in mutual-protection-insurance-groups.The gypsy view of gaije, reinforced by the gaije view of gypsies as uneducated and illiterate thieves and swindlers, eliminates the exit option and so empowers the kris to enforce gypsy law by the threat of exclusion from the only tolerable human society.This reminds me of The Use And Abuse Of Witchdoctors For Life: once your culture has a weird superstition, it can get plugged into various social needs to become a load-bearing part of the community structure.The Amish have some internal mechanisms to prevent this: congregations are usually on good terms with each other, but if Congregation A accepts a member being shunned by Congregation B, then all of Congregation B’s members will shun all of Congregation A’s members.
In practice, this makes it easy to switch rules as a member in good standing who honestly doesn’t like the laws, but hard to break the laws and get away with it.
Amish people who refuse to abide by lesser punishments are excommunicated, though they can be un-excommunicated if they change their minds and agree to follow the court’s orders.
Amish congregations are nominally democratic, but in practice Friedman calls them dictatorship-like because everyone votes the way the bishop wants.
Everyone in the group would pay a fixed amount yearly, and if one of them got robbed the group would use the money to hire a prosecutor to try the criminal.
Group members would publish their names in the newspaper to help inform thieves whom it was a bad idea to rob.
Each congregation will have its own rules, especially about which technologies their members are or aren’t allowed to use.