Politeness has always been against the rules. I always thought it was bad mannered to go to someone's house without being invited. Just show up and expect them to stop what they are doing and listen to someone tell them what they are doing wrong. I don't think they have ever been big on politeness or manners.
Also, when they are "spying" or "stalking" you, its the same thing. They just sort of "jump out of the bushes at you". Follow you to a restaurant, follow you to a friends house, come to your house after dark to announce your JC.
It's all rudeness...which is a tactic of intimidation. It's manipulation.