I don't think it needs to completely dark, they would probably lose too much revenue to justify this... but why don't they black out the site with an overlay an

I don't think it needs to completely dark, they would probably lose too much revenue to justify this... but why don't they black out the site with an overlay and a message "this is what would happen if SOPA becomes law, click here to find out more and contact your local member of congress" and then the user can close the message and continue as normal with the site. (This is screaming out for a jquery plugin!) Obviously you could then just target markets and leave the rest of us free thinking robots to carry on as normal :)