If you're interested, most people would agree that when you connect to a defcon wifi network you should probably be... cautious. Let's face it, Defcon is to RSA from an info-risk pov as walking in downtown NY at 1am is to walking around the North/South Korean DMZ at 1am. Both are hazardous, but one of them is just plain insane.
Now watch this: https://www.youtube.com/watch?...
That's the 'so what'.
And keep in mind that most ppl are still using the same passwords on multiple sites.