Not to make light of your scare...I'd be nervous myself. However, my sister worked in SF at a ground floor office with one way glass windows to the street where she parked her car on a Sat morning. She witnessed a homeless man break her car window and steal her dirty laundry from the back seat. She was going to do laundry on the way home. Turns out the soon to be Mayor (then head of Police) Jordan witnessed it as well and chased the guy. Retrieved said dirty laundry, arrested the guy and my sister had to go to Police headquarters to "identify" her dirty personals. LOL!
Also living in the city with a cr*p car, we decided to just leave it unlocked after having the windows broken so many times. Lovely sidenote is that we didn't get robbed but the car had a lovely pee smell in it from those choosing to sleep in it overnight. Oy vey!