I always find this kind of stuff interesting.
Albert Gonzales broke into a bunch of my work's servers (for years) at my first job, after a customer of ours pissed him off. I had some AIM coversations and lurked/logged in one of his advertised IRC hangouts. Most of the transcripts went to the secret service, which was very interested in his Credit Card fraud activities (as advertised on IRC).
https://usa.kaspersky.com/resource-center/threats/top-ten-gr...