Three examples of how katniss showed rebellion

During the private session with the Gamemakers, in anger over them not paying any attention to her, she shoots an arrow straight at the Gamemakers table, shooting the apple out of the roasted pigs mouth pinning it to the wall. She decorates Rue's dead body with flowers to show them that the tributes are more than a piece in their games. She gives Peeta poisonous berries and keeps some for herself so they can eat them. The Gamemakers won't have a victor and the Hunger Games would blow up in their face.