I might as well share my technique (patent pending) for getting rid of the door-to-door proselytizers: answer the door buck naked when they knock. Do NOT step out of your house while doing this. We had some persistent folks for a few months many years ago that came every other Saturday, bright and early, wanting to give us a copy of Watchtower. They apparently were confused about the meaning of the "No Soliciting" sign on our door, even after we explained that, yes, they were trying to sell us something.
Well, the day in question, which still irritates my wife a little when I tell the story, featured two men in their early 20s who were honestly only trying to spread the good word. Well, I had had enough, so I disrobed and opened the storm door, leaving nothing but a screen door between their good word, and the gift that God had given me. I can still picture the look in their eyes as they changed from offense to defense. They stammered and stuttered as I told them I was about to rattle the missus, that they were not allowed to come in and watch, and to tell all of their fellow members of the flock to never, ever come back on our property.
Not only did they never return to our house, but they were never seen again on our street, either. I regaled a neighbor with what I had done and he thanked me profusely. Apparently, this particular church had been wearing people out and not taking hints for years. I solved it all in 30 seconds on a Saturday afternoon.