You must also read about Suzette Baker, former head librarian in Llano County, Texas. Her story is told in the above compilation. She was told to pull books from shelves and refused. She writes about a very avid minority of people in power who are promoting censorship and she's concerned.
I'm concerned. Yes, parents should know what their kid is reading. It's like television. You may control your own self and your family, but don't keep me from reading certain books that your don't like or think is appropriate (example - To Kill a Mockingbird by Harper Lee, The Bluest Eye by Toni Morrison, etc).
Sigh!