When hackers convene at their annual conferences, they play a game called Spot the Fed. The rules are simple. If you think you see a federal employee walking the halls, point the person out to your colleagues around you. This might, or might not, trigger a storm of controversy or some nervous laughter. If your fed radar proves keen enough, you win a free shirt that reads, "I spotted the fed!" The person identified gets an "I am the fed!" shirt.