All the collections don't need to appear into the backoffice. Especially the crossed-table ones. Any collection that represent a fixed list of vocabulary/tages/references don't need to be seen by the client/editor. It gets in the way and can be distracting.
For example, News Posts must be seen by client, but Type of News and Geographic zone of news don't need to be listed.
I just witnessed a client trying to delete my "type of references" records because he didn't know what to do with it and thought it was misplaced...
Thanks for listening