If you browse this forum, you will see countless threads discussing moderation, criticising it and providing constructive feedback. There was a very active one yesterday about the way the moderator team deals with holocaust denial threads. However, discussing specific warnings or specific moderator actions is what the AAM is for. It ensures privacy and provides a confidential environment for both the user and the moderator and, given they are the only parties really involved, the public forums are not an appropriate place. It's also the reason why your warning histories aren't available for everyone to see.