Virgin Atlantic recently fired 13 employees over content that they had been posting to Facebook. After the news spread, people on Virgin Atlantic's Facebook Fan Page responded by calling out them on firing employees over Facebook content.
From the Facebook Graffiti feature:
More anger stemmed from the wall on the Fan Page:
The medium that caused the firing of 13 employees is the same medium being used to voice grievance against the company. I won't comment on whether Virgin Atlantic was right or wrong in firing the employees since I haven't read all of the details.
My advice for Virgin Atlantic: don't overreact to the negative criticism. You have about 8,000 fans on Facebook and only a few angry comments. Don't get hostile and lash out at the negative comments. It's the internet, it happens.