Unfortunately, this is not the first time I have seen someone get a public (or even private) warning reminding them of the rules that they recently broke, and take that as a deep personal insult and leave the game.
Personally, I think such behaviour is about as extreme an overreaction as you can get. I can somewhat understand feeling that you were unjustly convicted, but I don't see how that justifies leaving the game over a simple reminder "this is a rule, please follow it in future."
