Jonathan Kamens reports an MBTA cop threatened him with arrest for trying to give reporters at this morning's Google Maps/MBTA press conference at South Station flyers about incorrect bus-route information at mbta.com.

Although the building is publicly owned, it is managed by a private company, a representative of which told Kamens he couldn't exercise the First Amendment without a permit. A few minutes later, a T cop told him to knock it off or she'd have to take him away, he says.