these are serving suggestions, not iron-fists
Enforcement is forbidden.
Fences not.
Thieves should be perfectly free to starve to death in the town square.
Or accept exile.
This society sounds lonely, boring, dangerous and stressful. You should visit me in Japan. It's not perfect by any stretch but they stumbled upon some secret sauce.
Shame is just another term for social-contract. I also think the balance between internal and external influence is great. They maintain a national identity without getting too cocky.