can we have a "mute yourself to x player" option

what if riot came out with a way to only type to certain people who are in the game who you queued with in the same group, and players could be invited and removed into chat room while in game

Pros:

• would allow premades who trash talk each other jokingly to do so without risking getting spite reported by the one random in the group
• would allow players prone to raging to perhaps blow off steam without hurting anyone's feelings.
• would make it so flamebaiters and provokers could be dealt with easier
• would allow players to communicate play calls to your premade without someone chiming in
• bot lane could use it to only talk to thier duo and jungler minimizing needless chat for mid and top

cons:

• trolls could use it to assist enemy team without thier own team knowing "easy solution automatically disable allchat for people who use this feature"
• could potentially fuel "premade mentality"
• players may forget they muted themself to someone. and try to make a play. and fail because they were muted to x player