There's nothing quite like a good read, but some people prefer to read the CliffsNotes on famous works of literature rather than reading them. When that happens too often, people sometimes start throwing out lines from books and poems with meanings totally different than what the author intended to say.
This great TopTenz article features a great selection of the most misused literary quotes so you can stop yourself from making the same mistakes. It's up to you to decide if you want to correct people using these quotes wrong, but remember, some people can't take even the slightest criticism, so it's not always worth mentioning.