Re:Ask HN: What are decentralized Twitter alternatives?
by jaredsohn on Sunday January 10, 2021 @02:42AM
(#25712020)
I think this is more about something like running a chrome extension to have comments without the site owner's involvement.
https://www.google.com/search?q=chrome+extension+comments+fo...
Disqus has done this to a fairly wide extent. They allow site maintainers to moderate comments IIRC.