I just saw last week an interesting Meiri who seems to argue with the Halachah quoted in Shulchan Aruch that one is allowed to report on somebody who is a ????.
The Gemara in Gittin 7a brings a story of Mar Ukva who sent a letter to R’ Eliezer, complaining about a person who was ‘starting up against him’, and asking if he was permitted to inform on them to the government. R’ Eliezer replied by discouraging him from reforming.
There is a discussion in the commentaries exactly what the story was, and whether R’ Eliezer was giving advice or actually talking from a Halachic point of view.
The Meiri explains that Mar Ukvas opponent was a Moiser himself. He therefore asks why was it that he wasn’t allowed to report on the moiser – we find that one can kill a moiser!
The Meiris final answer is that it is better to kill him than to inform on him, and informing is forbidden even on somebody whom it is permitted to kill.
??? ????? ?? ??? ????? ????? ???? ???? ???? ??????? ??? ???? ??? ?????? ???? ?????? ??? ?? ?? ??????? ???? ???? ?????? ???? ??? ???? ?????? ??????? ???????? ????? ???? ???? ??? ??? ?????? ????? ???????? ???? ???? ????? ?????? ?????
(I know we don’t pasken like the Meiri, but I was still surprised to see a Rishon who argues!)