Based on reports that protesters may use their cellphones to coordinate their actions, San Francisco’s Bay Area Rapid Transit (BART) authorities shut down underground cell phone signal to the trains servicing the downtown to SF airport route. The protest—which never happened—was to be the second gathering protesting the shooting of a homeless man by BART police last July.
Authorities claim safety concerns; others see the censorship as another toehold for Middle East style oppression in the US. gives more details with words from both pro and con viewpoints.
My own views as an Iranian are quite biased against the authorities. I hope they are convicted in court and sentenced to 40 hours of instruction on the Iran experience with protest censorship. Many IC members are qualified to teach this course. Get your resumes ready!