In Little Brother, teenagers are marked as one of the main suspects. Perhaps it is because authorities thought that they'd be the ones least suspected and therefore became the most suspected.
In the book, the DHS (Department of Homeland Security) secretly kidnaps videogame-playing geek-like teenagers and label them as their key target. Until the story's main character, Marcus, reveals this secret to the public, many innocent people are held captive in nearby prisons where they are interrogated and humiliated until they tell authorities what they want to hear.
