If you break a social contract, it puts you in a position where you feel shameful or isolated. This is shown in To Kill A Mockingbird when Scout and Dill have a conversation about Dill’s father and Scout pushes the boundaries by saying

“Then if he’s not dead you’ve got one, haven’t you?”

This puts Dill in a position where he doesn’t want to explain to his new friends where his father is or what happened to him as it might make them think differently of him. Furthermore,  ‘Dill blushed’ which means that he was feeling embarrassed or ashamed. However, I do not believe that breaking social contracts would only cause an emotion of shame or embarrassment but could also create anger or provocation.