I don't know much about ethics, but it's painful to watch beautiful things be destroyed. It's reminiscent of a child pulling wings off a moth. It's suggestive of a disregard for life that lessens the surprise of hearing about the Mike Brown vs Darren Wilson fight. However, I watched a fight between a blue crustacean and a scorpion, and the intelligence displayed was fascinating. Both of them were heavily armored relative to their offensive capabilities. After flailing around for some time, the scorpion zeroed in on the lobster's eyes and joints, securing the win. It was really interesting to see how dexterous the scorpion's stinger was, and how quickly it adapted to such a novel opponent.
They also clearly know when they are out-matched. They try to escape instead of confronting their challenger. This seems a clear indication of who the victor will be.