“One of the world’s largest hacker conferences, Def Con, requested that government employees do not attend this year’s annual conference, citing discomfort with federal officials in the wake of National Security Administration revelations. Traditionally, there has been a general acknowledgement that not all federal government employees who attend the Def Con conference do so openly, and a jovial ‘Spot the Fed’ competition has become commonplace at the Def Con conference. General Keith Alexander, the head of the NSA, spoke at last year’s Def Con conference and denied that the government had vast files of information, calling it ‘absolute nonsense.’”
http://www.csmonitor.com/Innovation/2013/0711/Hacker-conference-tells-Feds-not-to-attend
