Believe me, I don't need you to tell me that my actions in the following situation were wrong. I know it. I chose it. That's right -- like most passive-aggressive people, I was aware of what I was doing and yes, I took a little pleasure in it.
It's one thing to work with other people's children and to role play for possible scenarios they may encounter. It's a much more nerve-racking ballgame to have the day come when your own child is smack dab in the middle of mean girl behavior.