The lights are going out all over Twitter
guardian.co.uk
guardian.co.uk
In Canada when the government introduced their new copyright laws about 100,000 people joined a facebook group overnight. Alone that group wouldn't achieve much, but all media picked up the "100,000 people Facebook group" and it was headlines for days, causing the government to backdown on the bill.
I do agree that if people want to change the world they should get out and do something to change it directly, but if they aren't willing to do that these small online protests still do affect the real world.