Usually I do not lock my APT even at night. It is fairly safe here, and I felt the same way in Japan. But, the U.S. is different, espeically in suburban areas.
I got my first and unique 'virtual rape' in a suburban area of the U.S., even though there were a few people strolling in the nearby parking lot. Nobody cared me, and I was so much terrified. I still think I was lucky. I did not report it to police, and I regret it so much that I heard a radio news that a girl was raped there in about a week. I guessed it was him, the same guy.
Barbie~~