Skinning other peoples kills.

As you can see, i'm a warrior which means that usually warriors don't have skinning as a profession, so please don't comment saying "you're not a hunter!" or "Why are you skinning?'
I have a worgen hunter and he skins so yeah. Anyways whenever I come across a skinnable animal or creature a I skin it. Right? So why do paladins and warriors start freaking out if I skin their kill? It's not like they can skin beasts, so why can't I? Is there a reason they should need their kill just lying on the ground there? Please give me a reason why a PALADIN OR A WARRIOR should need a dead SKINNABLE animal. If you have had this happen to you please explain what they said, did, and what YOU did.