In reply to your question: "is it not possible for Mgmt to at least require a rule that no one is to make up false and erroneous information without them being a part of the f/s?"

This would be very difficult to do. If actual names weren't used, people would get around that by nick-names or descriptions.
The person being talked about would have to find out about any information posted about them in a fellowship - and then who can tell if something is false or not? Its a very difficult request to honour, even if these rules were in place.