Generally speaking, I'm against the idea of AA. Essentially because it IS, no matter what people say, an attempt to dupe people into seeing the army as cool and exciting and subsequently join up. It may well be that it doesn't work very well, but they're only going to try and improve it.
On the other hand, it's almost entirely up to you to not be a retard and believe that it portrays a realistic, or even remotely plausible picture of what life in the army is actually like. For instance, I've downloaded and played it (it's ok, not at all great) safe in the knowledge that at the end of the day it's just a game and there's no way in hell I'm joining any army, let alone the US army (regardless of the fact that I'm English....).
So I think if you're already smart enough to not want to go get yourself killed fighting for extremely dubious reasons against whoever the finger's pointed at this month, you're smart enough to play the game and enjoy it, or not, for what it is. If you're not....then there's already a high chance you're gonna sign up.
But that doesn't excuse the fact that it's an underhanded and fundamental deceiving recruitment tool - which puts it in exactly the same class as all other military recruitment. Hedge-o-matic makes some good points - the military basically takes whatever it can get.
I see every reason for it to be an M rated game.
Finally, for the GTA vs. AA argument - granted, not many people are convinced either way, but the important point is that AA is sold as a reliable source of information about the military, whereas GTA is sold as pure fantasy. The US Army is lying to you, Rockstar is not.
EDIT: Twrecks, I think you're too quick to say that patriotism isn't a product. Obviously, it's not, but that doesn't mean it's not being sold as such. Same for religion in other contexts.
Lemme guess - tl;dr?
