Is it hair or fur? Hair would be sort of like you shaved it off and the beaver could still be alive, fur is part of the dead animal... I am hoping it is hair... I have seen human hair extensions here, so I don't think that would be a problem.
My sister and I tie flies...which means we make our own fishing lures for fly fishing. It's an art. It's most likely hair, not fur. And a bag that size would go a long way. It's not in any way inhumane. I'm a pescatarian, so I've done my research.