At our church we'll be doing some Bible studies using a booklet specifically to "talk about" (refute) the book/movie. Of course we may (probably?) just end up preaching to the choir.
Many people saw the movie National Treasure. But most of them know that there is not some underground treasure hoarded and stored by our country's founders. Compare DaVinci Code to National Treasure and this will have somewhat put it in the proper context.
Another analogy is Gone with the Wind, it is a glorified version of the Old South. The story is of course made up, but so is some of the detail about plantation life etc.