Annoyed Librarian, I think I'd like to have a martini with you.
In the spirit of the thing, a few of the books I was assigned at my small, conservative high school. Never mind the Shakespeare; it's too easy:
The Great Gatsby, F. Scott Fitzgerald: Infidelity (is anyone faithful in this book, except Gatsby?), murder (not just one, but TWO! And that's those that are explicit...), flagrantly flaunting the articles of the U.S. Constitution (rum running, anyone?), animal abuse, domestic violence, organized crime, sexism
Lord of the Flies, William Golding: What isn't up with this book?
The Divine Comedy, Dante Alighieri: I suppose it's fair to say all of the deadly sins are represented? I always felt like the way Dante handled Beatrice was also slightly blasphemous, given the contemporary climate.
Of Mice and Men, John Steinbeck: Animal abuse, ableism, murder, lying, classism, sexism, violence, racist language, swearing
Civil Disobedience, Henry David Thoreau: This book is down-right unpatriotic! All citizens should stand behind their country during a time of war.
The Handmaid's Tale, Margaret Atwood: Menage a trois, sort of (and Gossip Girl thought they were being all revolutionary), sex slavery, sexism, terrorism, rape, homosexuality (not that I feel this belongs in a class with the former list, but this is the sort of thing conservative parents get all freaked out about), infanticide
Proof positive it doesn't matter what you say, but how you say it.