Here are some Christians resources and essays speaking out against the book and the movie titled “Fifty Shades of Grey.”
Fifty Shades of Grey’ and the Annihilation of Christian Women’s Innocence by Worldview Weekend
The Truth About 50 Shades of Grey by Christian Action
Fifty Shades of Genesis 3:16 over at Practical Theology for Women
I also want to add the following:
“If you love… you will hate and hurt?” by Rob Barkman.
While the last one is not talking about the movie, I think it is relevant since Rob does a good job Biblically answering the silly view that the one you love you must hurt.