More on the tor scam

So, whatever happened to this? "Black Hat Cancels Presentation on Cracking Tor" http://www.pcmag.com/article2/0,2817,2461204,00.asp http://freedomhacker.net/tor-project-fixing-vulnerability-that-could-expose-... Why was the talk cancelled? Did that happen in the Western Cesspool where 'freedom of speech' is oh so fucking sacred? And what about this 'vulnerability'? Isn't tor oh so amaazing that even the NSA can't track tor users...except that's a stupid lie?