Doesn't it do the opposite though? It gives criminals a map of exactly who they shouldn't rob, lest they risk getting shot. I imagine criminals will go after the softest, easiest targets, not the hardened, well-armed ones.
>Criminals get guns through burgling and robbery.
Are you sure about that? I thought it was more via buying guns in states where they're easy to get and which don't keep registrations or records, then illegally, covertly transporting them across state lines, and then sometimes removing/filing serial numbers and other identifying info.