Need a cop in San Francisco after a midnight crime spree leaves you splattered onto the sidewalk or showered under a sea of broken glass? Good luck with that one. Police understaffing has reached such levels that in one of San Francisco's largest police precincts, three cops stand between crime, chaos, and ... you. According to a report in the San Francisco Standard, that's what one of the county supervisors found and he's talking about it:On any given night, San Francisco’s largest and most populous police district will only have three or four officers on duty, Sunset Supervisor Joel Engardio...