During the Olympics opening ceremony, when cameras cut to JD and Usha Vance, most of the crowd responded with loud and sustained boos. Canadian viewers heard them. Journalists seated in the press tribunes in the upper deck heard them. But as I quickly realized from a groupchat with friends back home, American viewers watching NBC did not. This was censored. Crowd dissent is not a failure of the Olympic ideal. In open societies, it is part of how public sentiment is expressed.