Again: Walmart, whatever, needs to post sighs. The right cannot be supposed where it does not exist.
Good point. But if you are going to try to make a statement you had better know and be prepared to explain your rights to a police officer or employees who doesn’t know the law or company policy. Makes more of a statement and might keep you out of trouble that way — “oh, we do post no firearms, it is on the east door, not the south door,” etc.