People hide for various reasons such as crimes they committed, sadness, or regret over past actions. Some historical examples include Osama bin Laden hiding from involvement in 9/11 and Saddam Hussein hiding during the Iraq war. Hiding can be seen as a symbol of fear and is a common human impulse, as shown through examples like bin Laden avoiding capture or the character Johnny hiding after a murder in the book "The Outsiders" due to regret over his actions.