I don't really care to watch, but I do like answering the door on Mormons wearing my most elaborate spiritual regalia (cloak and ritual pentacle). It freaks them out and is somewhat amusing. Don't get me wrong though, I'm very polite to them and will even invite them in for tea. It makes it all the more fun watching them fidget while trying to speak to me.
I do the same thing with Jehova's Witnesses too.
My mother isn't a Pagan, but she likes passing Mormons on to me who usually give up and go away when they realize that I'm not only a Pagan, but a well-educated one.