In "The Odyssey," what "laws" of behavior and attitude does Polyphemus violate? Explain. [infer]

This is an interesting question, especially as we contrast the Cyclops and the Greeks in general and Odysseus in particular. The Cyclopes live in a society where there are no laws. They have no civility, no councils, no traditions, and no sense of what is right or wrong.  They are cannibalistic one-eyed giants. That pretty much sums it up. Polyphemus is the most famous of them. Part of the reason why they do not need structure is that they have an abundance of food; they land is lush. 

All of this is in stark contrast to the Greeks. The Greeks have councils, traditions, laws, and what is very important in the Greek world is  hospitality. This is why the whole Trojan War started. Paris stole Helen from the Greeks. It was a huge breech of hospitality. From this perspective, Polyphemus is a barbarian. He eats a few of Odysseus’s men and want to do the same to him. From this perspective, he is the anthesis of the Greek.