The Christian Science Monitor, August 16, 2011 by Daniel B. Wood
http://www.csmonitor.com/USA/Justice/2011/0816/BART-puts-social-media-crackdown-in-uncharted-legal-territory
“This is loaded with legal issues that could go one way in a district court and another in a circuit court, but the US Supreme Court is the only one that can really clarify them definitively,” says Jesse Choper, a constitutional law professor at the Boalt Hall School of Law at University of California, Berkeley. “Both sides will have lots of ways to articulate their cases, and it will be compelling to see where it all leads. This is substantially uncharted territory.”