Pretty straightforward idea, add the potential for a person shooting at someone holding another person up as a meatshield to receive partial damage depending on the size of the gun and the skill of the shooter.
I think there should also (and maybe there is?) be a chance that a skilled shooter hits the person using the meatshield. Feels like as it stands right now it's sort of a perfect shield? Maybe I just haven't run into the times that strikes/bullets get by though.
Guns with bigger bang go through more and hit more! Wouldn't necessarily be opposed to certain weapons like katanas having the same deal. If you hold up a victim and I push a katana through them with force, you're gonna be feeling that when it passes through them.