The Power of Social Networks

So we are seeing the power of social media take place in different parts of the world. You may have already read about Kenneth Cole’s social mistake of using “#cairo” in one of its tweets or Rosetta Stone’s deletion of hundreds of FB wall posts regarding a certain support or 50cents tweet about a penny stock. Do you think social networks and its users will have the power to actually drive down a company’s stock or cause a management shakedown (similar calls for the removal of Groupon founder as CEO after superbowl ads)?

Do you have any other examples like the ones above?