@toddgrotenhuis I have to admit I don't know. 😔 As the feeds are public, I can see a potential privacy issue with muted/blocked versions. Anyone could infer who's muting who based on the feed's content.
So if there is, or ought to be, a muted/blocked version of the feed, it should probably have a private URL (like the bookmarks feed).
@toddgrotenhuis Yeah, that's probably the best solution unless your feed reader of choice support filters. In Feedbin, for example, you can set up actions that filter away posts based on rules like "if author equals Joe" and so on.