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?
Wouldn’t advise leaving things unlocked overnight in general, but it’ll depend where in the US. Here out in the exurbs I have neighbors who haven’t locked their houses or cars in years, but I just personally wouldn’t fall asleep without locking my doors. Maybe it’s the true crime podcasts getting to me.