My first memory of Mitnick was a very early web viral 8bit sound file (ADPCM if memory serves) that was purported to be Mitnick (it turned out later to not be Mitnick); "I know sendmail technique. ...". I can still hear it in my head today. I got my start into infosec working as an admin at my university; trying to keep on top of students being naughty was a good introduction.