Asshole-ish and Stupid Customers at your job

Thank god I'm out of retail for the time being, customers being the absolute moronic mass that they are. However! Last week I was at Publix (grocery store around these parts) and the woman in front of us was raising a helluva stink. Apparently there was a wine sale. I looked over at the wine she had and at the sale rack which, luckily enough, was right across the way. The sales tag said $4.99" and smaller, but still prominently "with attached coupon". Now, the bottles of wine were $7.99. The woman was raising a stink because she thought that the bottles were $4.99 and that the $3 off coupon attached to the bottle brought them down to $1.99.

Wouldn't it take just a TINY bit of common sense to realize that no corporate grocery store is selling wine for $1.99 per bottle? I mean if she had enough time to stand and figure that she would be getting the $3 off shouldn't she have had the time to look at the sign proclaiming that the wine was $4.99 WITH THE COUPON?

Jam it back in, in the dark.