"THe actual answer is, "If someone comes to your home, and threatens you family with harm unless you deliver a package, agree to leave but instead of delivering a "package", stop by your local Walmart, buy a .3006 hunting rifle with a scope and shoot him through the living room window."
Or at least if you're willing to go so far as to bash someone's head in for the package and your victim's firearm is lying there on the floor, take it and save your family. Apparently our lib-appeaser was only willing to fight fellow Americans.