In baboon communities, the baboon group shuns the odd baboon if his ears are abnormally large. They insult this shunned baboon by throwing dung at him and forming a circle that he is no longer able to enter. This keeps the homogeneousness of the group. This makes sense to baboons.
Wes Craven, director of 'Scream' and 'Nightmare on Elm Street', dies 76 (Haaretz)
from the article: Ultra-Orthodox school bars girl over her 'mother's immodesty'