Yes. It's only human nature to judge other people. Judging always happens in every single person wether you like it or not. But! Judging someone does not have to be a negative thing either. I can look at someone's tattoo and think "Oh! That's so artist!".
Books are a great gateway for knowledge. They provide a broad variety of information from a great number of veiwpoints. What knowledge and veiwpoints that students want to learn and take sides with should be up to the students themselves and not a "higher athority" such as the school. It's a basic right to have a personal opinion.