I hate to admit this, but at Wal-Mart I specifically went to a guy that was lucky to be 18 and at Wal-mart I also hit an early 20s guy. I used to be a cashier and front end manager at a grocery store and know that the younger they are, the less they care. The guy at Target was having register problems so we had to switch. When we were done, I said "Well now I get to hit you with all my coupons." He looked at the stack and said "Wow, I don't have the time to search for all those coupons when I shop." When he was ringing them, he joking said "Are these fakes?" He couldn't believe how much my total went down.
These were my exact thoughts also! The lady I had actually held my yogurt coupon beside the 4 pack of yogurt that ran up as a 4 pack of yogurt and asked me, "is this a 4 pack?". Uh...yep! I don't typically pay much attention to the cashier, but there are definitely 2 that I will no longer go to...regardless of how long lines are! And I really do not cheat the system in any way - legitimate coupons should not make me feel like a criminal!