I once had a manager pull me into an office and he reamed me, slamming his cane down on the arm of the chair missing my hand by inches. He read me the riot act. You'll never guess what my crime was. I was guilty of interdepartmental communication. Yep, I communicated to another department about upcoming changes that would affect their workflow. Sadly, I didn't learn my lesson as I still communicate with others. But I'm working on it... :)