Seems the method will rely on sharing file hashes. Should work in most cases but hashes would not be that difficult for a bad actor to change with some basic knowledge (I.e. terrorist uploader)
I don't feel comfortable flagging it because I disagree with the reasoning behind the policy, but isn't this political?[1]<p>[1]: <a href="https://news.ycombinator.com/item?id=13108404" rel="nofollow">https://news.ycombinator.com/item?id=13108404</a>