SF has 3-5x the property crime of most major cities in the United States. I imagine most violent crime is targeted (i.e. the victim is not a random person walking down the street), but property crime is scary because it can happen to the best of us, our friends and our family, in even the "safest" neighborhoods. We all know friends whose cars have been broken into. And it's easy to imagine --- what if my kids were at home during one of these home break-ins? (Note that burglaries are not classified as violent crime in SF)