I'd love to see them speak the truth at the door just once...
"Hello. My name is Joe Publisher. I'm one of Jehovah's Witnesses and I'm here today to try to convert you to our religion. Now, I won't be able to that in one short visit, I know, so what I'd like to do is leave these magazines with you...for a small donation of course. And then, I'd like to come back next week with more literature which I'll sell you for a price that you are comfortable with and set up a time each week where we can sit down and study that book to show you why we think we are the right religion and why you need to join us. Once you join us you'll understand, I'm sure, why this work is such an important public service and that you too, will want to share in this work to sell more magazines and books and convert others to help us increase sales and gain more marketing reps."