If a spectator begins to criticize a referee at a baseball game by yelling out,"Do you know the rules? Can't you see? Do you need some help,Ref?" and the people around the spectator begin to cast sour looks back at him for disturbing the event,this is an example of:

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Quizplus · Accepted Answer

The crowd casting sour looks at the spectator is an example of informal sanctions, which are unwritten and unofficial ways in which society enforces its norms. The negative tone and disapproving looks indicate that the crowd disapproves of the spectator's behavior and may serve as a deterrent for future outbursts.

If a Spectator Begins to Criticize a Referee at a Baseball