Around once a week in the Bay I'm exposed to severely reckless driving (going 60+ mph downhill through residential stop signs around blind curves, not swerving into any of the 3 empty passing lanes when going 120+ till within spitting distance, actively swerving in front of me to throw trash into my windshield and slam on the brakes while zig-zagging to prevent passing, ...).

Police are sometimes helpful but usually won't bother to even make a report. I take less psychotic roads nowadays even if they're slower. I'm not sure what to do other than stop driving or leave. Do you have any advice for surviving SF roads?