You could have a system that is not anonymous without having to reveal who actually complained, except under certain circumstances. That is the way it should have always been, IMHO. No one should be able to file an anonymous complaint about anything. That way the system can track who is complaining and how often, etc. and possibly even restricting access for a time if necessary to avoid someone making a career out of it, or to stop frivolous complaints. But that does not mean the system has to reveal the complainer to the complainee. That is not a good idea, except possibly under certain circumstances (if some type of legal action is taken for example). Again, IMHO.