Anonymous threatened to blackout the Internet

Anonymous has threatened to blackout the Internet if Stop Online Piracy Act is passed:

http://www.homelandsecuritynewswire.com/dr20111223-anonymous-threatens-internet-blackout-over-controversial-legislation

Some people might ask how can the entire Internet be blackouted.  If the root zone can be taken down, all websites and emails in the world will disappear.  It is not known if Anonymous will attack hundreds of root servers scattered around the globe.