If your too [censored] to not play when your parents are around because youll get in trouble you shouldn't buy it in the first place.
As a middle-aged advlt male, with no kids, I certainly hope (nor do I expect, based on MW & OB) that the game doesn't have the level of violence of, say, Manhunt or a Resident Evil game.
Personally, I find excessive graphic violence to be disgusting. It does not bring me enjoyment....
As an M-rated game, it shouldn't have to have features that cater to a non-M audience. By making it a mature game, they are appealing to a mature audience, the majority of whom are not disturbed by the gore. They shouldn't have to cater to phobias, and they shouldn't cater to minors. That's simply not the target audience.
...and, also personally, I find it to be pretty immature, too. (Depends on the context, of course..... the blood/etc at the beginning of Saving Private Ryan, while disturbing, was
there to be disturbing and to emphasize how awful modern war is. A mature use. Meanwhile, the standard flying-buckets-of-entrails that gets dumped all over your typical R-rated "Woohooo! Violence!" film, is there to make Beevis & Butthead go "Heh heh. Blood. Cool." Amazingly immature use. Guess which category I consider most "we're courting controversy" M-rated blood & guts games to be in?)
So, yeah.... I was glad to see that you could turn off the absurdly over-the-top blood splatter in Dragon Age. (honestly, it was incredibly stupid looking.) And if, by some slim chance, Skyrim has a similar level of http://tvtropes.org/pmwiki/pmwiki.php/Main/Gorn to your average horror movie, I'll hope that it comes with an optional toggle as well. Or I'll be waiting for a mod to tone it down.