Knock them on the head.

I've not met a door knocker in a very long time however my response is first and foremost to be polite. "Thank you, but no thank you. Have a nice day." That being said I live in a town densely populated with Mormons. I find that when they ask if I am a member, and I say no, the conversation doesn't press. They tend to stone up a bit and the interaction ends very swiftly, but it's never been confrontational.

I would like a visit. I would talk to them and question their faith with patience.

I have a sign on my door.

Just be polite and say "thanks, not interested" and close the door. There's never an excuse for rudeness.

I take there paper. Tell them im sorry, im aready committed, have a nice day. Ask them if they want their papers back. Say thank you. Shut the door with a smile.
There trying to do good for people. I don't want to hurt them.

I have a pentagram hanging on the wall behind the door, so when I open the door they can see it. I tell them I'm a pagan and while I like the teachings of their God. I prefer my Gods and my idea of the after-life. That usually freaks them out enough to go away. lol

I have a sign on the door and for the most part it is repected. Those who do NOT respect it receive my standard sermon on why I am an atheist.

I come to the door wearing nothing but an AR-15 and a Speedo. jk I don't always bring my speedo.

"I'm not interested" and close the door. Same with any salesperson. P.s. do listen long enough to know they don't have troubles of some kind.

If it is over a religion, I establish the fact that their god is all powerful and answers prayer and is always ready to demonstrate his power. I then tell them to curse a tree that is near my driveway and the roots are damaging the same. I point to it and I yell do it now, right now. They do not walk to their car, they run and drive as fast as they can down my 300' driveway to the street. Damn I wish I had a video of that caper. I just stood there in amazement, as they disappeared in the distance.

luckily i live in a closed apartment complex. I wouldn't cuss at them or anything I would simply not answer the door. but they don't come by anyhow because it's a closed property and they have a whole neighborhood to walk to.

I don't have any problem with door-knockers. I just answer the door in the nude and somehow they don't want to talk very long.

A Jehovah's Witness came to my door today and gave me an Advent Calendar.

Every day I opened a door on the calendar it told me to F**K OFF!!

I would ask them the same question I ask everyone else. Are you here for the orgy?

I love the Mormons best ..I always ask them if they have ever watched South Park episode about the Mormons.

"Please come in, we were about to conduct our blood ritual and could really use you."

Attempt to convert them.

I'm not buying what you are selling today thanks

I like religious door knockers!! Especially Jehovah's witnesses - what fun !! They have to proselytize and yet there are apparently only a specific number of places available in their heaven and they won't get one if they don't convert someone else!? So they are converting people they know there isn't a place for in heaven, right? The ill logic is just astounding. Tbh we don't really get many of those , haven't seen one in years.

I used to open the door completely naked and that seemed to work as they never came back

Generally, there is an assumption that people can walk up and knock on your door without an invitation. Putting up a clear sign that reads "No Soliciting or Proselytizing" will notify door to door salesmen and people espousing religious doctrine they're not welcome.

i usually go about making out like i will go to their place of residence!! i ask them where do u live do u mind if i turn up and talk to you about not believing in magic men in the ski... then they almost always say things like i do not believe i want people just randomly showing up on my door step then u rub their face that they are annoying and harassing u...
u can also legally charge them money !!! for simply say knocking on a door see the fact of this matter is signage how people often walk past them without taking full note.. so u make a sign that cost them money fro say knocking on your door informal contracting clause and a video camera to prove they have done just this and u can litteraly charge them cash for crossing a line/barrier/ knocking on a door or the like..

I invite them in for tequila shots and put on some good 80s midget porn on my 65 inch TV. That usually keeps them away . . . Unless they are into that kind of stuff, then I have them coming over every other day!!!

Just put up a sign saying no soliciting