The Greatest Protest in History Has Just Started
There have been so many large protests throughout the history of mankind, but in my opinion, so many sites going black ranks now as Number One! The organization, the participation is on such a grand scale! Many sites are going black from 8 AM to 8 PM EST on Wednesday, January 18, 2012, but Wikipedia went black as of midnight.
More about the Sopa Strike here, including the sites going block on January 18th.