New Sign on Our Door

After several times answering a knock at the door (costing loads of pain, time, effort and maneuvering around floor obstacles with my cane) to be greeted by a sales person or snake oil religious being, I changed the sign on our door from "Please be patient, I am disabled and it takes me some time to get to the door." to

"DO NOT KNOCK ON THIS DOOR UNLESS YOU ARE DELIVERING SOMETHING OR WE KNOW YOU.

ANY SALES WEASELS OR DOOR TO DOOR RELIGION PUSHERS WILL BE GREETED BY AN ANGRY PERSON WHO CURSES WELL."