The invention of email is one of the most popular things by which you can do silly stuff, for instance, online flame wars, sending critical stuff outside the company, and some gaffes like forwarding potentially inflammatory stuff to the upper management, etc.
This one guy is very popular here. There was a commotion outside the room where I was doing a group assignment with two other guys, someone told me that this pop-guy 'accidentally' forwarded one email to someone who was till last year the alpha dude of the pack. The email in question: that humorous stuff, story about how a certain slur, rhyming with 'pluck yew', originated during the Battle of Agincourt. People were advising him about how to 'recall' that email. I am sure many must have done something like that. I have done a similar act when I sent the answers to a quiz to the list instead of sending it to the quiz creator and got few angry emails in return, again through the list. Now children reading this, be aware of such mistakes and reduce the already high risk in our lives. The returns to such things are always negative.