I was a voracious reader in junior high school. I read many books in our co-joined public/school library.
I read "The Thin Blue Line" by Joseph Wambaugh, This is the story of a frontline policeman in the USA. I remember the arc where he helped arrest gay people for being homosexual.
I read "The Devil's Butler" by Simma Holt. It was based on a true story of Hell Angels kidnapping a hippie and using him as a slave for several weeks, even forcing him to have sex with a female slave.
These books should not have been in a library for junior or senior high school students.
We can argue whether to ban or not to ban all we want. Such discussion will never find a solution as to which books belong or not.
The real solution is to have some democratic mechanism where the community has a discussion, a vote is taken, a decision is made, and that decision is reviewed a year later.
No book, whether banned or unbanned, will be the death knell of any community.