At least Ron Howard, director of the cinematic version of the Coded Craziness, doesn't seem to buy the "it's just fiction" line. From The Telegraph:
His goal, he says, was to duplicate the experience of reading the book, despite the fact that the book unfolds in real time over a day and the movie will run for about two and half hours. Certain things have been omitted, although nothing major has been changed.
"We used the novel as the basis for our movie," says Howard, "and it is not a reinvention of the novel. It's a screen adaptation of The Da Vinci Code."
Howard, himself a fan of the book, had no intention of changing the storyline. "I'm very interested in the range of themes," he said. "It's intriguing on a lot of levels. It's the kind of fiction that provokes thought and conversation and debate, and it did that for me when I read it. It's quite unusual for a story to have that many ideas working in the same plot line, and I chose to make the film because I was intrigued by those ideas." ...
"I think people relate to the story for personal reasons," says Howard. "Some are interested in the mystery, some are interested in the spirituality and some are interested in the locations. I honestly think that a lot of people get a lot of different things out of it."
For more of Howard's thoughts on directing the movie, see this previous post.