Do they have a large sign on every entrance door? Most places I’ve seen only have one very small sticker on only one entrance door and its just a handgun in a circle with a diagonal line. I always figured I’d just say I never saw the little tiny sticker...I went in through a different door that didn’t have the sticker.
Where I live that is a legal defense - it was not properly marked. Also where I live it is only considered a trespassing charge. And that is if they notice it and they ask you to leave and you don’t.
The big one for me is the schools. So far I have remained legal and not carried going to my kid’s schools.