First of all, sorry if this is the wrong category!
What I have in mind is a medium.com clone using Discourse, with a custom signup flow which would create a user and an associated category, which only they could post new topics to (roughly equal to a blog). Each blogger would have their own category that only they could post in, probably with some custom frontend to order by post creation date rather than most recent post (haven’t checked that bit yet).
I’ve looked over the API and user creation looks quite simple. What I’m interested in now - before I start - is whether or not anyone thinks this is ill conceived, partly or entirely. What do people think?