Originally Posted by Sereg Anfaug
If your friend found any player's behavior to be offensive, he should report that player at the end of the game. If he didn't feel someone was bad enough to take his time to report them, then they do not need to be reported.
You have no reason to be involved in this situation.
Actually, I encourage the OP's prerogative to remove/reform a toxic player in game, even if they can't participate directly in reporting. Standing idly by while watching it is like just watching a crime happen before your eyes. I'd rather have it go reported by as many people as there can be, whether or not they are the ones being offended against.