The Da Vinci Code: Not Going Down as Expected?

I've had two friends and associates tell me that when they went to see the Da Vinci Code in theaters this past weekend - and one was VERY upset with my low expectations for the film - that many theater goers laughed in inappropriate places, spewed raspberries at the end, and had unkind things to say about the actors and direction as they film let out.

Me? What do I know? I won't even watch it when it comes to TV. I have yet to like a film version better than the book on which it was based and, as I mentioned, I thought Dan Brown's The Da Vinci Code was a poorly character-driven book where only the subplot was fascinating.