I honestly hate how game rating arn't enforced enough. And, since this has been confirmed by IW, and general knowledge. There is going to be a section in it where you either witness or play as terrorists. Doing "Terroristy" things. This is COMPLETELY Skippable and will have more then one warning telling you to skip it if it makes you uncomfy. But, I know for a fact that the bigger the warning is, the more people want to see it.
I fear that the community thats not old enough to read a Tom Clancy book (re: not a video game), will have a cow. You know what, bigger then a cow. As will most of the communities that have nothing to do with video games. (Think of Alien Side Boob times 5.)
Now, this is a very important part of the "movie", if you will. The story. And frankly. I want to watch and enjoy my movie/story in it's entirety. But I know, I really do know, that some developer said "Think of the 15 year olds." and MY game had to get kiddied up, even though it's an M rated game. No, I don't want a gorey, sweary, crap-filled tub just to make it "too mature", but the themes, the ideas, and the stories have to be kiddied up. At least they feel like they are in video games. Don't believe me? Go read a book. Go read a Tom Clancy book or something, how about "The Sum of All Fears" where terrorists detonate a nuclear device at the superbowl and kill millions of people. Thats not going to be in a video game unless those millions of people are either nazis or aliens. Or those things from Gears of War.
Either enforce it, or don't have it. But don't have it only to not enforce it.