Here are a few more obscure answers (if you want to be the kid that finds the ones no one else has said):
- On the first day of school Miss Caroline assumes by Walter's appearance that he needs money for lunch, will take it, and is able to pay her back. She does not realize how insulting her charity actually is - even though the rest of the class does.
- Scout then insults Miss Caroline by attempting to be diplomatic. Miss Caroline again reads into Scout's attitude as disrespectful and out of line. Really, Scout has only innocent intentions. Ironically, Scout feels sorry for Miss Caroline.
- Mr. Dophus Raymond always drinks out of a bottle hidden by a paper bag - perhaps wanting to give the appearance that he is "the town drunk" (a way to escape judgement for his 'mixed children') but it turns out he's just drinking Coke.