Rules about these kind of things are like running around with a shit shovel behind a cat in the living room, clearing things up, but maybe a bit late. If you apply the basic principle of taking regard for other people's feelings, and treating them with respect, you don't need the rules.

Unfortunately there are some people who don't apply that basic principle, either because they are thoughtless and engrossed in themselves, or because they are engaged in some kind of power game which entails intentionally needling some people, and manipulating others into going along with this. They need house training.