I DO have a sign like that!!! The problem is, it seems like no one around here can read signs. Or maybe they think they are too good to read.
I have not one, but TWO signs on two sides of my Zippo lighter display case that says "DO NOT TURN THE CASE. THERE'S NOTHING ON THE OTHER SIDE". What is the first thing they ask? "How do I turn it?"
I have another case that is dark without the light being on, but since business is slow, i don't want the light on all the time. So I have a sign that says "If it's too dark, plug in the cord. UNPLUG IT AFTER YOU'RE DONE." What do they say? "I can't see anything, it's too dark" IF, and I say IF, they see the sign, and the plug without my help, clearly they have read the sign then, yes? But they NEVER unplug it. I always have to go back over there and unplug it myself.
Another sign I have sitting on top of my register that says "No checks please" Of course, they ask "Can I write a check?" Who even writes checks anymore????
Sorry I am going off so much right now, but I have not sold anything today, and have had to put up with a lot of crap. More than usual for a Monday.