Everybody leaves the car sometimes (not too often at all) unlocked by accident and the car is still there when you come back obviously, but in the same way that it is there it could have been gone or missing your pesonal stuff that was inside, not a problem whether my area is bad or not since we have a private garage to park the car but anyway whether the zone is bad or good doesn't matter, as i said everybody locks the car when it's parked outside, whether a shopping centre underground parking or a crowed street of a city the car is always left locked by everybody.