The biggest one I can think of is The Catcher in the Rye. It is a good book, and if someone likes The Catcher in the Rye it means they are well-read. If someone says it is their favorite book then they probably identify with it too much and missed the point.
What are some other examples of this that you know of?
It’s not really about a book, but more about a character or situation: if your favorite aspect of A Clockwork Orange is the rapes, the murder and the violence, aside from not understanding the book, you may be a bit twisted - same for American Psycho: if you read >!the nail-gun scen!