Kevin Mitnick on social engineering for hacking

Did five years:

Dubbed the "most dangerous hacker in the world," Mitnick was put in solitary confinement and prevented from using a phone after law enforcement officials convinced a judge that he had the ability to start a nuclear war by whistling into a pay phone, he said.
Mitnick didn't do any whistling on Saturday, but in his keynote following the panel he talked about how he listened in on FBI phone calls during the three years he evaded the FBI, left them doughnuts when he narrowly escaped raids and was chased down by a helicopter. He also demonstrated how to be able to see the phone numbers of callers on caller ID even when they have their number set to be blocked.