Well, the decision on this issue isn't up to us actually.
I've mentioned this before in another post, but the only time you would really see blood is when you shoot someone in a bare, exposed flesh area, or the head. If you shot someone in the mid-section, you'd actually see a puff of dust because the blood would get caught in the clothing. If someone got shot in the arm or the leg, you'd see a red mist appear, but not tons of blood. The only time you'd ever really see gore (as in limbs flying off) is if someone got hit by a mortar or artillery/AA round. A grenade wouldn't really severe a limb unless a person jumped on it practically (grenades kill by fragmentation, not concussion).
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Latuh fuh U,
Benson
benson@2015.com
"We don't introduce or cause bugs in the game, we merely find and bring to light the inadequacies within the code."
-regarding level designers