I mean, I always assume that if you are in a group with someone regularly you’re not just gonna be malicious about it.
I know if I were the narrator of a story I’d probably have a Hell of a good time if the players just decided to hijack it for a few minutes. Or that the players wouldn’t mind if I “accidentally” led an asshole player to his untimely doom.
Doing something like that, in my eyes, is fine as long as you’re not a spiteful asshole. You can fuck with a friend in a fun way. That friend is just an omnipotent power who can do hilarious things. Not, like, ruin their games or anything.