3. Jonathan James

Years active: August—October 1999

Hack job: James was responsible for several hacks, but his biggest and most infamous happened when he hacked into United States Department of Defense computers and stole NASA software estimated at $1.7 million, including software containing the International Space Station's source code for controlling critical life-sustaining elements. His work forced NASA to shut its computer system down for three weeks. James was the first juvenile to be jailed for cyber crime, showing the world that it doesn't take a rocket science to hack into a rocket scientist's computer.

Total Payout: None really, but the software stolen was estimated at $1.7 million.

Punishment: Six months house arrest and six months probation, because of his age at the time.