I know that in certain countries like Japan or South Korea: it’s normal to leave the front door unlocked since the probaility of someone breaking in is low since their crime rate isn’t high. I knew a friend of mine who resides in Korea where they even left the car unlocked with the keys inside, can you do either of those things in America?
Growing up, we had a front door that we never used, so we left it locked, and the side door was always unlocked unless we were going on vacation or something.
My friends parents locked their door when they werent home, but they always left the windows next to the door unlocked, so they or I or anyone could just climb in if we needed to.
I dont know if people locked doors at night, but we didn’t. Definitely no one ever locked the door during the day when they were home. The first time I experienced someone doing that, I was so confused. If a thief is willing to go into an occupied house, they’ll be willing to break a window.
I would never leave keys in a car, partly because of where I live now, but also because cars are deadly weapons, and you shouldn’t leave those around where kids could get hurt.