If there's a rule that everyone breaks, then anyone who breaks it doesn't stand out. In fact, people who try to call out other people for breaking it get called names for being holier-than-thou or a wuss or something analogous. Anyone who decides to follow the rule gets taken advantage of by people who break it, so they don't feel bad about breaking it themselves. Even if it harms other people, those other people are rule-breakers so it's still a fair situation.