Comment by bradknowles

Now that would be a violation of federal law. I would inform the store that my wife is a lawyer, and we can have her law firm contact their law firm to discuss why they are in violation of federal law.

Then I would ask them if they want to reconsider this possibility.

Now, if you actually want to use this tactic, I would suggest you look up the federal law in question, so that you can quote it by section and paragraph. Maybe keep a printed copy with you.