On 10/7/2014 20:59, Roy wrote:

The SF Bay Area Rapid Transits System) turned off cellphones in 2011.

http://www.sfgate.com/news/article/BART-admits-halting-cell-service-to-stop-...

and the FCC emphasis that future actions "recognizes that any interruption of cell phone service poses serious risks to public safety"

http://www.sfgate.com/bayarea/article/BART-cell-phone-shutdown-rules-adopted...

I see that as a fundamentally very different mater. If I understand, they turned off repeaters ("towers") that they owned and provided, in tunnels and other structures they owned--equipment that they were under no obligation whatever to provide. A reaction to "bright" marketing ideas that had not been thought-through. -- The unique Characteristics of System Administrators: The fact that they are infallible; and, The fact that they learn from their mistakes. Quis custodiet ipsos custodes