That is not the way it plays right now.
Be scared. take a course for $$ and walk around with a gun.
Many businesses (mine included) have a no guns sign now...
(kinda odd for a vintage parts store, no...)
Hey, you don't want guns in your shop or home --- I'm all for that. Post signs and reasonably rely on enforcement of your wishes.
If you don't want guns in places over which you have no control, work with your local government to prevent it. If you lose because of a constitutional right the rest of have ...tough.
Your personal fear of guns should not govern the right of fellow citizens to own them.
This sounds cliche, I know, but do you think for a minute that criminals give a rat's ass whether or not you abhor guns?
Gun owners may, as FBI Director Muellens suggest, injure themselves more often than they do their assailants, but you and your shop doesn't figure in this calculus.
There are no statistics, at all, to suggest, that private (non-criminal) gun ownership leads to a greater rate of injury or death among non-family associates. So unless you want to keep your wife from packing heat, you don't have much of an argument.
As far as the family issue - yes, it's terrible when some miscreant kills his family members with a gun, but this is, statistically, a rare exception and should not prevent the rest of us from using a gun to protect our family.
In any case, it is not the role of the Government to control every aspect of our lives as if we were infants.
I fully appreciate that here I depart from my Liberal friends who believe that the Government knows best (as long as it knows what they know).