The term former hacker is being bandied about quite a lot right now (see examples here). The term struck me as odd simply because I think of hacking as a skill set, not a job. You can be a former police officer or former mayor because those are jobs that can end. But once you have a skill, you tend to retain it forever (like riding a bike....). My hunch is that the term is meant to suggest that the individual no longer breaks into other people's networks just for fun anymore, even though they could.