Case in point: 630 000 people have joined a "Boycott BP" Facebook group.  That's a large number that have connected as a group to say they will do something.

http://www.facebook.com/pages/Boycott-BP/119101198107726

BUT are they emotionally charged enough to actually do it?  That's the test. 

630 000 people connecting is a story, 630 000 people acting is a bigger story.