Doors and cars are also typically unlocked, sometimes the keys are left in the car too. I have always mused that if you wanted to steal a bunch of cars you would just take a trailer to a country town and load them right up.
It all worked out fine because it was a small community and people would know who did what. Steal a car? Where are you gonna drive it? Everyone will know it's not yours.
The other thing I imagine helps is that there are fewer mentally unstable people just thanks to there being fewer people. So someone "a bit off" would be known to the community. That can be good and bad.