There are private NZB sites where the NZBs themselves are not indicative of the context -- hashed titles, with password protected files. I work for a Usenet pro

There are private NZB sites where the NZBs themselves are not indicative of the context -- hashed titles, with password protected files. I work for a Usenet provider - it's still very much alive both for discussions and for file sharing. You just have to be very savvy.