re: #243 Mich-again

But if the person selling him the gun or ammunition noticed the same creepy signs, they would have no recourse to prevent the sale.

Merchants can deny service for any reason not covered under the Civil Rights Act or ADA. Responsible FFLs deny sales to people not all that infrequently, based on little more than gut instinct. Of course the internet ammo sale doesn’t provide much opportunity for a face to face evaluation of the customer so yeah, that’s a problem.