This is going to sound silly, but I think most people forget one important thing. Mark Twain did not write children's books. Huck Finn and Tom Sawyer  were written for adults. So maybe if people think the book needs to be censored for kids, maybe they should just wait until the kids are in highschool to teach it? Teach Junie B. Brown and Encyclopedia Brown to grade school kids instead. Having kids aged 10 and (OMG!) about to be 13, and working with that age, I can tell you that most of them won't 'get' the ideas behind Mark Twain's writing. So why frustrate everyone? Its the same with Shakespeare. Why try and teach Romeo and Juliet to 4th graders? All they focus on is the bedroom scene and realizing that 2 teenagers have just had sex. Kids aren't ready to understand the books, so they end up hating them instead. OK, that's my 2 cents.
Ida