I like that ghouls and filthy [censored] cylons can get there limbs blown off but I HIGHLY doubt that humans or living creatures can have entire limbs blown off and continue assualting us. Just imagine the amount of shock a person would go through having a limb blown off?! And then there's the blood loss.
Imagine how off that would look fighting a raider who's arm you just shot off shooting at you like nothing happened. I think limb dismemberment for humans and living creatures will be like fallout three happen upon death.....seeing my characters limbs flying away in a death scene was pretty funny.