Book censorship, also called book banning, has been a common occurrence in schools. There are a number of reasons that various books undergo censorship. The following are the top five reasons for book censorship.
Books like Huck Fin, To Kill a Mockingbird and The Lord of the Flies have all been censored in various schools due to racial slurs and racial prejudice.
The Color Purple, Slaughterhouse Five and The Bluest Eye have all been censored in various schools for use of profanity. It causes disorder in the classroom.
The Lord of the Flies, The Color Purple and The Bluest Eye are also reasons for book censorship because of sexually explicit passages which are inappropriate for the class environment.
The Harry Potter Series and Slaughterhouse Five were both censored because of violence even though, in the case of Harry Potter, it is primarily science fiction.
Witchcraft and Religious Offense
This is actually one of the most common reasons for book censorship. Harry Potter and many others throughout time have been censored in various places because they are considered blasphemous.
I think you will notice that the top five reasons for book censorship are all very close to the issues parents have with technological media today. I guess the world never really changes?
As someone who works in a library, I find book censorship horrendous and 100% believe in ALA's Freedom to Read. How dare someone decide what is right for another to read based on their own ideals. A few years ago, there was a movement to ban a new book by a well known teen author. The reasons: it talked about S-E-X. I read the book. It talked about it in precisely ONE paragraph. The girls boyfriend wanted to have sex, and she told him she wasn't ready yet. Each year I make a point of reading several of the country's most banned books, and that example isn't the one ridiculous one to make the list. Sanchez's books are regularly banned because they talk about accepting teens who are LGBT. Abstinence and tolerance. Two great reasons to ban books.
I don't believe books should be banned. I do believe tho' that schools and parents have to use a little common sense in what they allow kids to read and when - while some of these on your list aren't appropriate for younger kids, I can't imagine going through school without reading To Kill A Mockingbird or Lord of the Flies. As for violence, the Bible is filled with it...and arguably the best book to be read. ;)