The Copyright Office’s study concerning Section 512 of the DMCA (the notice-and-takedown/safe harbors part of the law) had its second comment period end this week — which is why you’re seeing stories about how the RIAA is suddenly talking about piracy filters and notice-and-staydown. The Copia Institute has filed its own comments, pointing out the already problematic First Amendment issues with the way the current notice-and-takedown system works. Remember, there’s a very high standard set by the Supreme Court before you can take down expressive content. But the notice-and-takedown system ignores all of that: