January 4, 2010
After receiving harassment complaints from photographers, the San Francisco Municipal Transit Authority issues an official photography policy which states: "The general public is permitted to use personal, handheld photography and videography equipment on all Muni in-service transit vehicles and on publicly accessible SFMTA property, including Muni stations, as long as such activities do not interfere with transit operations."
Read more:
http://calibersf.com/2010/01/04/muni-photography-policy/