People generally lock their doors around here, and their cars, and keep things safe. It is not extremely dangerous, and not every guy walking down the street is going to try and steal from you, but its definitely not a small town either where people feel comfortable leaving their doors unlocked at night and trust each other.
Quite a few of my neighbors have had their houses and cars broken into over the years, and my parents personally have had 3 seperate incidences where their cars broken into that were parked on the side of the street, or where the windows were smashed out and the car raided for small change and CD's and lots of useless little things. The neighborhood I live in is kind of a "mixed bag". You've got everything from old ladies and couples that are model citizens and live a quiet and happy lifestyle, to drug dealers and criminals with guns and grow ops, and literally everything in betweem. High income families, low income families, criminals, and just plain old regular folks with families. So although the neighborhood is 'safe' for the most part, most people exercise atleast the minimum level of caution and security for their homes and vehicles.