Isn’t solving trust issues with further mistrust leads to an even lower trust in the end? (genuinely interested because “low-trust/high-trust communities” concept is a topic I know nothing about.)
So, if you want to solve the issue, you use the methods which work in the affected area.
In high trust, as long as the thing is seeing benefitting most, it is often followed. In low trust, breaking a rule is often seen as a sign of independence and generally being cool, so you need to put deterrents to make it uncool to get caught.
At least, this is coming from my own personal experience living in different countries. Might not be the same everywhere.
People no longer (for instance) leave their children (or even their dogs) outside shops whilst they go inside.
I'm not sure specifically about kids and dogs but I'm not quite sure that was the case then, given the extremely huge heterogeneous society that was already back then. What do you think?