In case anyone is wondering what I was wondering:
https://en.wikipedia.org/wiki/Dreamwidth
Ah! Thank you. I was wondering why mjg59 needed to geo-block people on his blog. I had no idea dreamwidth was a platform and he was only a user of that platform. I don't think I've ever seen anyone else's content on that site. Now I feel dumb because I've been calling him "dreamwidth" in my head for years.