That's a good question, and it's one where the whole idea of ethics gets defined. It's sort of like what YOU see in the mirror as opposed to what other people see when they look at you. Not simply a question of legal/illegal or the difference between getting away with something or getting caught. Laws can be enforced, ethics can not. So, the bottom line here is how do you feel about killing those coyotes and not using the pelts? For me, I can't justify killing an animal and not utilizing it in some way, but I have absolutely nothing against anyone else doing so, as long as it's legal and done in a way that's respectful to the animal... even if it is a coyote or other "varmint", it should still be killed quickly and humanely.