Why can't we mute people in champ select?
Especially with how long champ select can take now, sometimes it's immediately obvious that you don't want to hear anything a specific person as to say. With the roles assigned to you and pick intent, there's enough information to go off of if a person is muted, so I think it would be a good idea. It would also let me ignore the people who immediately demand I play a tank support.
Related but not really: I really think mutes should carry on for the post game lobby. If I don't want to hear anything a person has to say during a game, I really don't want to listen to them afterwards.