Seriously, it is impossible to get a shooter these days that isn't 18+ - Haze, Timesplitters, army of two, kayne and lynch, Unreal Tournament 3, the club... The list goes on and on. When are they going to take a break from supergory gaming?
They are killing (no pun intended) a market worth billions by making next gen consoles only really suitable for 30-something gamers - please, hear my plead and create something less bloodthirsty, developers of the world!
Oh, does the baby need a bottle?
Seriously though, think of it this way: If you are going into battle in real life, do you think there is going to be *less* gore? No. Games are meant to some sort of alternate reality, where you can jump in, and control armies, or be a sniper, or hand to hand combat. It helps to have realistic fighting to make a game...more realistic.
Plus, just the fact that like GTA I can blow some ones head off is awesome. I am not a disturbed being, but there are times when I just want to do that to some of the people I meet (not literally, but you know, there are some people you would just like to strangle, so to speak). And it just makes it hella fun!