I don't get "angry" when I spot an inaccuracy in a film, but I can't check my knowlege at the theatre door and when I do spot something that sticks out as wrong it damages my "willing suspension of disbelief".

I was totally into Saving Private Ryan until the Russian T-34 made its appearance. They tried to pass it off as a Tiger.

My doctor explained to me once that he can't watch House or any other medical drama for the same reason.