When I covered the Republican National Convention in 2004, I kept tabs on the protest actions surrounding the convention via a handy-dandy Twitter-like text blasting service called TXTmob. Now those text messages are being subpoenaed by lawyers for New York City.  The messages themselves were relatively public—I was on the list, after all—and I’d be somewhat shocked to learn the police weren’t already up on the main stream, at least. But given the preponderance of protected political speech on the feed, as I recall it, I’d be a little disturbed if they succeeded in acquiring personal information about users.