It had to happen. It's also a lesson in life. It's just that the medium is different.
The newspaper article cited that an Adelaide supermarket supervisor has been sacked after she posted on Facebook a "heat of the moment" comment about another worker.
Perhaps because we're not face-to-face, we sometimes lose perspective and don't always stop and think. It's an age-old lesson though. It comes in various forms such as, "Count to 10 before you answer," "bite your tongue" and so on.
It doesn't matter if its email, Facebook, hi5, My Space or Twitter for example or...in a shopping cue or driving on a highway, it's about stopping before you say something stupid or act the same way.
It's just that we now have social media as as additional tool to verbalise what we feel and think, but the lesson is the same. Stop and think first....it could cost you your job not to mention irretrievably sabotaging relationships.