Punishing the local idiot.
This often occurs at set times, be they specific dates or times of day, depending on the location. The ritualistic hounding of the fool is steeped in history but enjoyed today by many societies.
Traditional cries such as "Fetch the Stick of Gimmon!" and "To the gimmoning pond!" would rally villagers, townspeople or housemates to the cause, and idiocy would know shame, fear, pain and spanktignation in roughly that order.