Do I think that SOPA and PIPA (please don't forget about mentioning PIPA - Google, Facebook, etc!) are so bad that a complete blackout would be appropriate? Yes, I do.

But I also think that a call to action is even more important, so hopefully they don't just go offline, but present the visitors with an overlay or a widget or something to call their representatives, and with some clear explanation in layman terms of what SOPA and PIPA do.