Argh. I think I have one of "those" in one of my Spanish I classes. She has to argue every bit of grammar. Like, "Why do they have masculine and feminine nouns? We don't so they shouldn't!" Or, "It's stupid for them to put their adjectives after the nouns! Will you take off if I don't?" (No, we'll just rewrite the Spanish language for you, dear.)
There's a boy who sits behind her who is already pretending to hit her over the head or throttle her when she starts to talk.