When I lived in Atlanta, if you worked in the downtown area (or just had to go and park there for any reason) and had to use one of the public parking lots there (in the 5 points area, near the Capital, courthouse, etc..) when you parked your car you would leave the ash tray open, the door to the glove compartment down and the top of the center console up. That way the crackheads could see there was nothing in there worth wasting their time to break your window for. If you had tinted windows you would leave them cracked down a bit so they could see in and see that you didn't have shit in there to steal.
Atlanta has been cleaned up majorly since then and the downtown area is very bright, white and all right currently with the po-pos in strong effect all over. But back then it was cesspool city and car crime was fucking horrible.