Some people in polite parts of the country have a hard time ending a conversation if the other party won’t let them/follow the local social protocol (not being sarcastic).
I think they meant not answering the door.
Also considered rude and antisocial in many parts of the country. shrug
If there are no buttons for salespeople to push successfully, then everyone wouldn’t be so irritated at them I guess? And they’d be a lot poorer.
When I was a bachelor, that was my strategy. Still annoying, but at least I avoided the confrontation. Now I have a couple youngish kids and more often than not knocks at the door mean friends coming over, so they end up answering without checking first and then I get called to deal with the stranger at the door.