destinyland writes: An undercover reporter at Defcon was identified, lured into an auditorium, and publicly called out. If you're "exposing" geeks talking about illegal activities at a security convention, it would work better if they didn't know you were there. Dateline's Michelle Madigan claims she was exposing federal agents in attendance at the conference. But the funny aftermath may be a milestone for the mainstream media. In a matchup against a handful of geeks armed with YouTube — they lost.