Among the interesting suggestions I"ve seen recently (and have encountered / thought of myself previously before) is this "feudal vouching system":
highly engaged community members, vouch for others, who again vouch for others. If people in this "Dharma-tree" accumulate problematic behaviour points, the structure at first, bubbles better behaved members to the top. If the bad behaviour continues, by single members or sub-groups, the higher echelon of members will cut that branch loose, or loose their own social standing.
https://news.ycombinator.com/item?id=26797017
Rather than use high engagement as a basis for vouching, arbitrarily selected communities, perhaps of about 50-150 active participants (posting or moderating) might be better. Think Mastodon, but in order to be federated, good posts must be "voted off the island", in the good sense.
I've been applying a somewhat similar notion to collecting and managing reading material and suggestions, what I call #BOTI, or Best of the Interval. It's a round-robin style system, where I compile a list of references over a period of time (monthly to annually seems to be most appropriate for me, though hour / day / week / month / year / decade / ... could be applied). At the end of an interval, some limited number of items is carried forward.
This is one way of addressing the "firehose of content" nature of information, recognising that in any given time period, you only have so much personal bandwidth to dedicate.
With the federated model, content federating is itself subject to assessment, and is effectively re-vetted. Note that different communities might favour different content: cooking, kittens, Kabbalah, canoodling, cypherpunk, core meltdowns, classic cars, concerthalls. Vetted / re-vetted streams themselves might be of interest.
Both community- and time-based elements of this could get interesting.
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