"Eight years ago Mafiaboy (Michael Calce) knocked Yahoo offline. Today he he works as a legitimate security consultant and has just published a book documenting his criminal career and offering advice on how people can protect themselves from people like him on the Internet."

While I believe that all minors should have a second chance at their lives, to publish a book about his activities seems to counter the anonymity that he was given, especially now that wants you to take his advice on how to stop people like him.  This reminds me of Kevin Mitnick, who attempted to return to public life after spending time in Federal prison, only to be ousted by the Security Professionals in the US.  Kevin now works in Europe.

BTW, the top 10 most notable Hackers can be found a: Top 10 Famous Hackers