Fluffeh writes "Around nine months ago, BART Police asked to have wireless communications disabled (PDF) between Trans Bay Tube Portal and the Balboa Park Station. That was because they knew a public protest was to take place there — and the service to the underground communication system was disabled. This affected not only cellphone signals, but also the radio systems of Police, Fire and Ambulance crews (PDF) within the underground. This led to an even larger protest at a BART station and many folks filed complaints along with the American Civil Liberties Union and Electronic Frontier Foundation. The FCC responded by launching a probe into the incident. The results were a mixed bag of 'To protect citizens!' and 'Only in extreme cases,' not to mention the classic 'Terrorists use wireless communications!' But even if the probe doesn't lead to a full proceeding and formal order, the findings may well be used as a guide for many years to come."