Thats real smart....
If you've never lived in a community like this, you have been deprived. In some small communities in Texas, it would not be uncommon for the house to be unlocked and your keys in your car. Why, your neighbor might need to come in to borrow some flour, or might need to borrow your car to run into town for groceries! Of course, that is far less common now, but it used to be pretty normal.
And neighbors watched out for each other, so if your neighbor saw someone he didn't recognize going into your house while you weren't home, that person would be greeted by a loaded shotgun when they came out.
It's still normal here in my neighborhood. We watch out for each other and take care of each other. And yes, I confront people in the neighborhood that I don't know to find out their business.