registers, big neon signs to say "hey douchenozzle, next one this is closed)
This is just bad design. Almost comically, your sign shouts, “Look at me, there’s nothing to see here”. You’re drawing attention away from where people should go. Of course this isn’t going to work.
Whoever thought advertising a closed register was a good idea needs to have their idea generator checked.
Well, did you actually read at least the first paragraph of the Wikipedia article I linked?