Speaking of social media and user-ownership, @firstname.lastname@example.org's smart sketches of ideas about feedback systems in social media are worth reading: http://vihart.com/social-media-systems-and-democracy/
As is Jaron Lanier's 1995 (!) essay on AI media curation. Dated now, but thoughtful. http://www.jaronlanier.com/agentalien.html
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