Today, I got someone fired. There was no way for me to do my job without getting him fired.
Technically, he was fired because he did something wrong. But I can't deny the basic cause and effect that if I hadn't brought it to someone's attention (and if that person hadn't forwarded the matter to freaking everybody, including the Executive Vice President), he would not have been fired.
And that is a bummer. It was really fun researching the answers to all these little puzzles, until one came along to which I didn't want to know the answer.