That's an interesting point, would be good to know who could be legally held responsible. The platform or the user? Or both?
Steemit is not the first or last website to host a lot of content that is in violation of copyrighted materials, but since every single piece of content is monetized, it could potentially come under more fire at some point.
RE: Is incentive structure of steemit is fair? What can you and whales do about it for curating better content?