I don't think it was the most well-thought out decision. I understand the priority on defense, but there's too much poorly understood technology and magic in the mountain for anyone to be fiddling with unawares. Not to mention, people were grieving everything belonged to someone. We've got magic users checking the goblins' gear, at least, although I'd as soon burn it with rest.
Tha I suppose that was obvious? It wasn't meant to be. There wasn't meant to be anything to be obvious about.