Jesse Brown has the most entertaining copyright story I’ve read in quite a while:
But some of the hooligans exposed on Youtube found a clever way to get the video removed—copyright claims. Under Youtube’s “Notice and Takedown” policy, all you need to do is claim you own the rights to a video and demand that it be removed, and Youtube will remove it. The video’s uploader will be informed of the allegation and then have a chance to challenge it.
But here’s the rub: in order to claim ownership of a video’s copyright, you have to identify yourself. And when Youtube informs the uploader that they’re being accused of a copyright violation, they have to tell them who their accuser is. So rioters are indirectly handing their names over to the very people who were trying to identify them.