We built this free little notification bar so you could add it to your site and show your opposition to PIPA/SOPA without having to black out. The text never changes, there's no account needed or anything like that, and you can take it down whenever.
FYI for any Ghostery plugin users on Firefox/Chrome: HelloBar is blocked by Ghostery out-of-the-box. You'll need to temporarily turn off the plugin to view the effect in the linked article (or look at the screenshots), and any of your users using Ghostery will not see the bar on your site if/when you deploy.
Then again, I'd imagine people using Ghostery are all fully aware of the dangers of PIPA/SOPA in the first place, so perhaps it's a moot point.
Clicking on the "Stop PIPA" button multiple times for me causes scrolling problems afterwards. It looks like the more you click it, the longer the problem occurs (Google Chrome / Windows).
Then again, I'd imagine people using Ghostery are all fully aware of the dangers of PIPA/SOPA in the first place, so perhaps it's a moot point.