We're happy to know that your city is safe from rats because of your sharpshooting skillz. They must be pretty lenient about the discharge of firearms in city limits; in most places shooting rats at the city dump would get you in a lot of trouble.
As for the "probability of them using it criminally" (regarding someone openly displaying their bang-bang at a restaurant, store, school, church, etc.) -- just how does the average customer KNOW the intent of the person carrying it? Did he come in to take out some customers ala El Paso, the Pulse nightclub, Parkland h.s.? Or is he just another customer, albeit one who's very insecure and/or wants all the other men to know he's Rambo (as EE put it so eloquently)?
Wouldn't that be ironic if two of our AR-packing patriots came around a corner at Walmart, saw that the other one was armed, and they fragged each other? Hopefully there wouldn't be any collateral damage.
The dump wasn't in city limits, just outside. But no, they didn't say anything. I'd think they'd know pretty damn quickly since idiot shooters don't walk around with their weapons in the open all afternoon before they start shooting, do they?
I don't think too many responsible gun owners walk around with an AR or AK, I sure wouldn't unless I was going somewhere I could fire it (gun club, etc.), and I wouldn't be taking it into Walmart (or any store for that matter). I doubt the number of those who walk around with an AR or AK is as many as you think.