2020-12-01 UTC
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petermolnar re stories a bit more: from a stricly technical perspective, at the moment, a feed is like and email: once sent, there is no way to revoke, unless the servers all agreed to support such a notion. That makes feed incapable of signalling ephemeralness. Ways I see out of this: thin feeds, with links only, content to be fetched; or, wannabe ephemeral content doesn't enter the feed.