I am posting this as a request and may be duplicating some one's else efforts, so I apologize. Content rating filter is needed. I am finding my self this evening creating separate folders for some of my movies so that my two kids do not watch content that they should not watch (e.g. American Psycho). I have a Plex account for both of my kids and there is no way to restricted sharing such content.
Creating folders is very unfortunate because now I have to manage this structure. Please, please, please add a content filter so that I can add restrictions.