I think it is a great idea in general. I don't think it solves the particular issue of this thread (unless I still don't understand it) because a user has to create such a list first, and that list couldn't contain an event that doesn't exist yet, the one where the person I follow suddenly posts porn... my lists won't know anything about that.

The problem of this thread is how do I follow somebody's rust-related posts without also seeing all the bitcoin related posts I'm not interested in? Of course I can't do that, I have to trust content authors to do something. But which something? I want to divide up content into categories or domains, where the author is doing the dividing, either by changing identities, or putting tags on content, or placing content onto different relays, and we've been discussing those three options so far.