Sure does! But when I've got a line of paying customers, "shrink" is not too high a priority for me.
I do make an effort to find the right item. We have a "cashier book" in the POS system that I can look stuff up in. Unfortunately it's not very robust when it comes to acceptable search terms, so if I can't find it after a few attempts, and the item is under $10, I just want to get the customer on their way.