BART's decision to start enforcing a little-known safety measure and roust people sleeping or lying in its downtown San Francisco stations is aimed at ending the deadlock over what to do about the underground system becoming a de facto homeless shelter. "For years the city would do sweeps, and the result was that the homeless would just go down into the stations," said one transit agency official, who asked not to be named because of the political sensitivity of the crackdown. [...] while San Francisco was enacting laws against sitting or lying to block a sidewalk, BART held off - in part because even the elected BART directors were split on what to do, with some reluctant to be seen as kicking homeless people out into the cold. [...] about six months ago, a BART police sergeant came across a little-known state safety code that bars people from blocking the exits of a transit station. When they met with city officials, they backed up their safety concerns with a video of an evacuation after an electrical arc filled the Civic Center Station with smoke back in 2012. The man accused of playing airport security agent and directing two women into a private screening area for pat-downs at SFO is not only a high-powered international financier - he's the son-in-law of the man who led Hong Kong's government when it was turned over to Chinese rule. Not so, says one fundraising insider, who tells us the Dems have the U.S.