Didn't have enough time to read all of these so if I repeat something someone else has said, I'm sorry.
One person thought mormons didn't believe in God.
People who would jokingly ask what we did in Seminary, as if they thought it was the stupidest class ever, would get the response, "We sacrifice goats." xD It was an inside thing we had going on in the class. Our Seminary teacher told us to do it only if they didn't seem to really care. If they seemed interested we were to tell the truth right out. If not, we'd say the goat thing, they'd look at us funny, and then we'd laugh and correct ourselves. It was so much fun to see everyone's responses.
I've heard the one where we're not allowed to drink soda.
There are people out there that always say, "Geez. Mormons aren't allowed to do anything." But when you think about it, it's not that we're not allowed. We have a choice in the matter. Depending on what you did decides whether or not you're excommunicated. They're like, under the impression that if you drink coffee, you'll be kicked out and condemned. I /choose/ not to drink coffee because it's what the Lord tells me to do. :3
My friend didn't seem to understand the concept that the scriptures were the /word/ of God, coming through Prophets and such. She thought we literally thought the scriptures were God himself or something. My brain almost exploded in trying to understand where she was coming from. X_____X
There are some people who think we're not Christian. <__<