I was walking home from uni once and ran into some Mormans on my street, and they were all "what do you know about religion?"
I said "well I was raised as a catholic for 18 years" and instead of saying "well this guy doesn't want to be bothered" they actually said "WOW so you KNOW ABOUT RELIGION?!?!?! Let us talk to you about the book of Morman!" and I said "nah I don't really want to know.
Then they asked "what do you know about the book of Morman?" and I said "only what I've seen on South Park".
They got heaps cut, but still tried to arrange a meeting with me, to which I declined. Then I walked home, and they happened to be door knocking in that direction, so they came to my house again. It was less than funny.