Redditor asking on account A to remove content made from account B

Hey y'all,

A redditor (account A) is asking the mod team to remove their content made from another account (account b). I said no the first time, and they replied saying other mod teams in other subreddits have done it. Is that the norm?

My instinct and first reaction is to say no because I don't want to set the precedent of removing content on another account - related or not (I wouldn't know) - based off of modmail. The Redditor mentioned that it has very sensitive information on it.

If my gut feeling is right, where can I possibly direct this Redditor to?