I'm actually quite annoyed to those people (Jehovah witness).

I only opened door to them once then after that they kept coming back and knock on my door, they always give me something to read and when they come back next time they will ask what I learned to the small book they gave and mostly I've got nothing to say because I don't read them, and I put it straight in the bin once they handed over to me. I don't open the door sometimes though.