As this sign says:
Banned Books Week (this week!) celebrates the freedom to read anything you choose. It's a great freedom and one many of us take for granted. Libraries and schools around the country deal with challenges and potentional banners regularly. Banned Books Week raises awareness for this problem. Most of the challenges are perpetrated by well-meaning parents. Now, don't get me wrong, there's no problem with a parent being aware of what their child reads and, in some cases, censoring what their own child reads. The problem arises when parents or other adults try to make it so NOBODY can read a book they disagree with.
So let's give thanks that we live in a country where a book like Fifty Shades of Grey can be on the bestseller list. I hate the book, but I will defend to the death your right to read it. (although, really, there's better literature out there).