Rules enforcement is always at the discretion of the faculty or staff member who witnesses the infraction. It might not be fair, but that’s racing. If your school has many small houses with long-standing faculty in residence, those dorms often acquire certain reputations based on the likelihood of being nailed for certain major offenses. That’s also human nature. Get certain faculty to be honest, and you will find that many have their own personal ideas about what is improper conduct worthy of major discipline. Opinions will vary. Don’t necessarily expect that honesty with students or prospective students present. What you want from any school is as much consistency as possible in the enforcement of the stated disciplinary policies. What you will never get is 100% perfect fairness of enforcement. That’s the reality your kids will need to deal with. The best bet is to not test their luck on an ongoing basis.