Was the store robbed while the dude was there? No? Then the store should be thankful by what he might have deterred.
When I read stuff like this it only reminds me how far we have to go.
I tend to leave private property when asked to. I don't ever enter a property with a no firearms sign. No one needed Barney Fife to gum up the works unless this was a case of assault or defiant trespass. Most cops are only good for revenue collection or stretching a crime scene tape when they remember to do it. Listening to police testimony while serving on a jury was a revelation. What a bunch of dangerous simpletons.