Where do people get their information on other religions?

Everyday I come to yahoo answers and read things about Mormons, everyday I laugh so hard. Today was the funniest when someone who is obviously got their information wrong, stated that the LDS church SECRETLY practices blood atonement, oh and apparently our property become their property whenever they please, and we are a Satanic cult. Anything else? I really find this amusing! Why don't just stick with polygamy, you can actually get somewhere with that! Personally I do not go around claiming to know things about other churches....sad others have to. Adversary, without what fun would we have?