I've added a special exclusion to a robot.txt file for a specific article. It was some years ago while in college. The article in question was about the presentation of an assisting professor who had some kind of misunderstanding with the campus newspaper and therefore the article wasn't especially positive in tone. Couple of years later I was the sys admin of the newspaper website and a letter arrived in my university email. The professor had found that I'm responsible for the website and had sent me a tearful story about how this article is ruining her life, because it is the top Google result for her name, and how she had spent thousands of dollars on scammers who had promised to change that, and she was asking me to remove the piece. Long story short, I forwarded the case to the newspaper editor at the time and she agreed to let me add a line to the robot.txt.
Edit: newspaper -> newspaper editor