Whether it's a rational approach depends on how costly the change is to make, and how much it helps. Banning people discussing certain topics in public through

Whether it's a rational approach depends on how costly the change is to make, and how much it helps. Banning people discussing certain topics in public throughout a university is obviously too costly. Adding a brief note at the start of an article/lecture/etc. saying you're going to be discussing something is perhaps not.