Berzerker
Deity
You kinda missed my point. Let's try again. There's a shooter at the front of the store. You're hunkered down behind the meat counter, maybe along with your new friend and his steel security blanket. The cops out front are yelling "come out with your hands up." You gonna raise your hands and head for the front door? Do you think your new compadre is gonna drop his security blanket and do that?
No, the shooter is toward the front of the store. If we're at the rear we'd leave thru the back or surrender to cops entering from our side of the store... But until the cops show up we're morally obliged to help instead of running. When they show up we can disengage the shooter and let them handle it. Since we're in the back and the shooter is in front, they'll find him first. With open carry the cops will know multiple shooters could mean innocent armed citizens may be involved.