If we like to speak about specific problems about lack of community respect - why to hide this message?
If people could flag messages and they will be hidden automatically this could potentially start some kind of battle for flag. I hope not.
If moderator keep that message hidden without any explanation then author probably could feel injustice. Some others could see (maybe falsely) mobbing techniques to wipe out opponent.
PS. About “democracy” - I probably share your opinion that it could not work better. Humans are complicated. 
But I am still thinking that this is good healthy forum! 