According to someone, "According to one source Ars spoke with at Defcon, Schwartz turned off his phone prior to the presentation so that he couldn't be told dir

According to someone, "According to one source Ars spoke with at Defcon, Schwartz turned off his phone prior to the presentation so that he couldn't be told directly not to speak." If this is true, it speaks volumes. But, who expects security researchers to have a mobile phone turned on anywhere near defcon? That's like using an open wifi network at defcon.