This is utter BS... Cell phones have been used and not until there some type of protest do they disrupt cell phone usage... I was there at the BART district in August... -.-
There is no law that states that transit agencies are required to provide cell phone service at stations and/or in tunnels along service routes. BART does it only as courtesy and convenience to riders. As such, it can choose to take away that courtesy...
Just as happened in Egypt,when the masses find new means to organize, the power structure finds a way to just push a button and turn everything off... Remember the "Free Speech Zones"???