This is a nit, but grocery bagging (one of the article's examples) is a no-win situation. I worked it as a summer job a while back--It’s the most bikeshed job in existence because (nearly) everyone understands it, but they all have their own theory of bagging.
To this day I remember a client whose entire purchase was a loaf of bread, a package of fresh raw chicken, and a bottle of liquid drain cleaner. Paper bags, of course. I don't remember how I arranged them but I remember being yelled at.
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