6. Jonathan James
Being only 16 years old, Jonathan James caused serious trouble for the US government. He hacked into one of the agencies that were part of the Department of Defense of the United States and gained access to various sensible data like usernames, passwords, and messages. But, the biggest problem was that he got his hands on a source code crucial for International Space Stations. The code had a task to control critical life-sustaining elements. After he was caught, James was sentenced to house arrest until he became an adult.