Namespaces is an idea that I have considered, and I have defined a kind of namespacing called "Unusenet", which uses "un" followed by the number of components o

Namespaces is an idea that I have considered, and I have defined a kind of namespacing called "Unusenet", which uses "un" followed by the number of components of the domain name that the namespace belongs to, a reverse domain name, and then the rest of the components. The domain name is normally the domain name of the server where the newsgroup originated; if it is then federated with other servers, they use the original domain name for that newsgroup and not their own. (For example, a newsgroup originating on "example.org" named "misc.xyzzy" will have the full name "un2.org.example.misc.xyzzy".) This is what I have on my own NNTP server. (You do not have to use the Unusenet convention, but I use it in order to avoid namespace collision.) However, I currently have no "feeds" or "blogs", but only "forums"; if I do implement a blog then I would probably implement in that way, though (and as I already mentioned, this was even my idea before you mentioned it; we just happen to have the same idea). But I run my own server rather than using those of others. Of course, not all users will want that, but that is why they can have a server where users can create their own access-controlled groups in a namespace in a few minutes easily like you mentioned.