im in evansville im not sure where else in the state they are
Signs like that have no legal weight in IN. You can be prosecuted for tresspassing if they ask you to leave because they notice your gun and you refuse. And it would be kind of dumb to refuse.
I think the signs serve as some kind of voodoo good luck charm. Everyone, especially the corporations, know they mean little, but they stick them up to ward off evil, anyway..............
Still, informing the store you will be shopping elsewhere is a good idea, in my opinion.
Or shop anywhere, and keep the handgun hidden under cloth.
I have been told that if it is posted "No guns allowed" it is not just trespassing, but criminal trespassing which is a felony. I will try to find some information to backup this claim.
You'll have trouble finding the information because it's not true.
There is an outside chance that a judge might rule that the sign itself constitutes your "warning" to leave the premises, but it's not a felony even if that's the case.