We had persistent folks come to the house when I was a kid. My step father was rude and to the point with them frequently. They continued to come back. Then one day he let our German Shepard and Dobermen meet them at the door (screen door closed, of course) and it scared them enough that they never came back.

In college, I shared an apartment with my 2 closest pals. There were these 2 Mormon guys about our age, so we humored them, listened to their deal, asked questions and shared our beliefs with them. We would invite them for lunch and just had fun getting to know them. We went to church with them once....it wasn't for any of us. I have photos of these guys and several fond memories.