What is the most dishonorable thing you've ever done?

I once got someone fired because I simply didn’t want the extra work required on my part to supervise him. He didn’t do anything wrong, he was not doing anything differently than he had been doing before I became his supervisor – I was only reacting to the situation I was put in by the head of the company (I was next in command, it was a small outfit) because the owner was too incompetent to train me – I had to stumble along on my own figuring out how to get stuff done, and I didn’t have enough time in the day to deal with this guy – so I actively campaigned for his termination. I turned his life upside down, on purpose. The shitty part was I was friendly with him, he was a guy I had come to know and like on a certain level (I had been with the company for a year at the time of the promotion that made me his boss) – so it was a little more cutthroat than if he was simply employee_09. What have you done on purpose tha was dishonorable (if anything)?