A bureaucratic stalemate is turning San Francisco's underpasses near the Bay Bridge into a free-fly zone for the homeless -- with the city's cops being ordered to stay out or face possible discipline charges. In recent months, squatters have been setting up camps amid the piles of beams and pillars stored under roadways for the retrofit of the bridge and its freeway approaches. In the meantime, police say, there has been a proliferation of auto break-ins and petty crimes around the freeway -- plus a growing chorus of complaints from neighbors and merchants who have had to put up with...