Daniel Oberhaus writes on Motherboard about #badgelife:

I hadn’t been at Def Con for more than five minutes before I was mobbed by hackers asking to see my conference badge. I had just left the press registration room at one of the world’s largest hacking conferences, but the attendees lurking outside the door weren’t concerned about my journalistic cred. Instead, they were all trying to solve an elaborate puzzle that implicated every attendee—and as I soon found out, I was one of the few people who could help them solve it.