I should certainly hope so! Here in Texas, we have a saying that, "There's a few sunsab!tches that need shootin'!"
I would be appalled to learn that all those folks are buying guns and then failing to use them effectively for their primary purpose: self/home defense. IOW, this study obviously considers it a "bad thing" when an honest citizen blows away some scumbag perp who is threatening said citizen or his family with deadly violence.
Some "homicides" are, indeed, justified, and are, imo, worthwhile acts.
"Risk factor", my @$$! How about "enabler".