that would be bad if people made up their own rules i think

If people focused on their freedom and ability to govern themselves in presence of a functioning justice system is good. Even in absence of a justice system and it remains a good thing to focus on personal autonomy.
It is better to focus on where you are free and what you are able to do and what things not to do. Then to focus on the things that we are restricted from doing. Like flying a hand held kite higher then 5000 feet