I live in a city, in Canada. I would feel completely safe sleeping with the doors unlocked. I've lived in small villages in Canada where everyone leave their

I live in a city, in Canada. I would feel completely safe sleeping with the doors unlocked. I've lived in small villages in Canada where everyone leave their house door and car doors unlocked - and nothing happens. I've lived in Montreal (second largest city in Canada) and felt completely safe walking downtown at midnight - not because I was particularly brave, but because it is safe. I remember visiting Yale and being told "not to go further than a block in that direction as it is not safe".