DNS, as I said before, when you are seeking to restrict or remove a RIGHT that exists constitutionally, then you have to support your position. Someone seeking merely to exercise a Constitutional right does not. For example, if I work for an employer who expects to limit my free speech rights, then that employer will tell me. No employer has to say that they won't limit your free speech rights because that is the norm anyway.
If you are seeking to remove a Constitutional right, then supporting your position is good. That is an action conducted in a court of law, not in Joe's BBQ.
However, you have completely missed the point. This isn't a court matter being argued before SCOTUS or a federal judge. The OP is about whether or not anti-gun businesses are proclaiming their position in a manner the OP deems to be correct, lest we deem them hypocrites (which I am sure will have them quaking in their boots if we call them such a name).
Just because a business or person is anti-gun does not mean that they have to paint great big gianormous signs and mount them in their business to proclaim their views, lest they be called hypocrites anymore than pro-gun people need to do the same to broadcast their support of the 2nd Amendment. It isn't the size or need of the signage that determines hypocrisy. The premise of the OP is stupid. Arguing that the opposition isn't doing a better job to meet our arbitrary standards is stupid.
Be that as it may, it isn't the anti-gun position that is at risk of being lost, is it? So if the court of public opinion is the standard by which we are conducting business as per the OP, the criterion here being the hypocrisy if one does not broadcast one's position loud enough, then pro-gun businesses should be making big signs. However, like I said, the premise of the OP is stupid.
Of course, MANY/MOST businesses that allow concealed carry are not necessarily pro-gun. They are ambivalent.
Do you really think we want all anti-gun businesses to mount a campaign of really promoting the anti-gun agenda in that manner, at the risk of such a publicity campaign actually working to gain strength for the anti-gun position? Or would we rather most just do what they do in a diminutive manner?