Jon McCoy is a .NET Software Engineer who focuses on security and forensics and the founder of DigitalBodyGuard.com. He has worked on a number of Open Source projects ranging from hacking tools to software for paralyzed people.
He has presented to many cons and orgs like AppSecDC about attacking .NET Desktop Applications.
He cursed and interrupted Army Gen. Keith Alexander's speech during Blackhat 2013.
http://appsecdc.org/jon-mccoy/
http://www.businessinsider.com/keith-alexander-gets-heckled-at-black-hat...