I had not thought about the problem that can be published freely in any community simply by using the corresponding tag ... You are right that it would be good to control that a bit, because the potential for causing disorder is quite high.

I see that administrator and other roles can be assigned, but I don't see that that is associated with any kind of permissions, in other circumstances I would expect anyone to read the posts, but only the members could use the tag to post there, leaving to the administrators the possibility of submitting an internal vote of the group when it considers that one of the post deserves to be discussed to keep it in the community or remove the label.

I think that exceeds the current possibilities of the steem blockchain, but I would like to see something like that in the future.