What people should understand is that cyclists running stops signs and red lights in SF has caused a huge backlash from pedestrians. In the last 5 years or so 2 pedestrians have been killed by cyclists running stop signs or red lights.
The police are responding to safety issues raised by larger community due to cyclist behavior, not picking on cyclists per se.
__________________
Life is too short not to ride the best bike you have, as much as you can
(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)