Prove it. Nobody has yet. You have the fire power and it's time to put your money where your mouth is. Do we have to wait until these beasts are on our doorstep?
Nope. You don't have to wait.
You are free to saddle up and go hunting as long as you're willing to suffer the legal consequences.
If you're shooting to defend your home and loved ones you'll get a lot more sympathy from the LEOs and community members than if you play Rambo.
I think a jury will likely conclude that rushing after the looters, as opposed to waiting for them to come to you, are quite different from each other.
I don’t think the jury will be as forgiving when it comes to the former.