[wrs]

Amusing on the surface, but of course that feature is for the benefit of the audience (and quite useful--the breaks are a bit of a zoo with 1000 people milling about), and they explained from the stage how to turn it off when desired, so he is reaching a little bit with that one.

[fabulist]

The implication wasn't meant to be that the organizers nefariously distributed these badges insisting that if participants had nothing to hide they had nothing to fear. It was that the participants will clap for whoever is onstage without thinking deeply about what they are saying or believing in what they are advocating. They'll cheer on Edward Snowden but they won't consider the implications of the technology they're using.