SOPA

First, as was pointed out in the 5 myths piece, content itself is not illegal. It's actions concerning a piece of content. So, by doing a notice and staydown, you're guaranteeing that perfectly legitimate uses -- including both licensed uses and fair uses -- get blocked as well. That's because to determine if something is infringing, you have to view it in the full context. No matter how much some copyright maximalists want to believe that copyright is a strict liability law, it is not. The very same content may be infringing in some cases and not infringing in others. Not checking the context of each use would clearly block forms of perfectly legitimate expression. That's a big problem.