I wanted to share some content recently to another plex user. I'd like to share everything in a library, except a few items. Rather than move those items to a separate library it would have been nice if I could add a "dont-share" tag to them and specify in the sharing permissions that I want to share everything except that tag.
The alternative is to go through several hundred existing items manually tagging what I do want to share, and remember to do that going forward for new entries. That's not really practical.
This is superficially similar to this request, except that this is talking about watch filters and search and I'm talking about sharing permissions.
https://forums.plex.tv/topic/144389-reverse-filters-feature/?hl=labels
If the underlying filter engine works for both cases then I guess the requests should be merged, otherwise it stands as a new feature.
