I had to step into a Christian bookstore today, I usually try to avoid ghettos of Christian subculture like Christian bookstores, but I needed the book The Reason for God immediately. While I was perusing Don Miller's titles I saw a warning label sticking out of his book Searching for God Knows What. The warning label read "Read with Discernment" and listed this website, http://www.lifewaystores.com/lwstore/discernment.asp. Of all the books to get a "warning label" I couldn't believe they picked this one. Some people just don't like to be stretched intellectually or theologically.
Just for fun, I looked up some BS (biblical stupidity) books about "end-times prophecy" that all Christian book stores have, books about how the Revelation "proves" the end of the world is coming and even though the books are out-of-date in a few years and their "biblical prophecies" never come true, they still sell for some strange reason. One of these books was about the coming of WWIII by John Hagee. Hagee has been known to say publicly that we need to start WWIII to help the rapture come sooner. Link
There was no "read with discernment" warning label on Hagee's book.