There is a campaign to block congress from access to web sites until the Patriot Act is gone. Blocking congress' access to my backwater blog would go unnoticed. Blocking access to Daily Kos WOULD be noticed.
Participating web sites embed a small snippet of code on their pages that detects the IP address of Congress' computers, redirecting anyone from Congress to this blackout page. To join with your site, simply embed this code on your page before the closing tag.
NSFW warning; nude photos of anti-Patriot Act activists.