In Texas, anyplace that doesn’t have a certain sign is legal to carry (more or less, besides education and bars and sports and other exceptions).
So all places *without* such signs are liable? I don’t think so.
I told you, SOMEone will start a frivolous lawsuit and it won’t matter to some lame-o jury what the law is or is not.
Was it illegal for McDonald’s to make coffee more than 110 deg?