I thought this BBC piece was interesting about young Russian students who hack protected systems for fun.

At just 20 years old, Andrei works for an information security firm. He says he does nothing illegal now, but he used to.

"I started when I was 14. I hacked a series of military resources, the US army, some Russian departments. I wanted to examine how well protected they were."

Andrei sees nothing wrong with what he did, as he made no money from it. Hacking for him is all about the technical challenge and the thrill.