When a user is not well behaved or when there is another issue, we have the possibility to raise flags, vote to close a question, downvote etc.
But what can the standard user do when a moderator has taken an inappropriate action or when he thinks that a moderator is biased? It seems impossible to appeal against a moderator's decision or to flag inadequate moderator behaviour. Or is there somewhere a "super-moderator" who can step in?
Just as an example, moderators can completely delete posts or comments, with a huge amount of arbitrariness. And there is ABSOLUTELY NO WAY TO BRING THEM BACK. No flags and alike.