The microblogging book by @mantonsblog is full of both technical and ethical info:
http://micro.blog is IMO a great model of smallish communities & solving a lot of social problems. It syndicates hosted & external sites.
a really need for nuanced and civilised debates around what open platforms should and could be, the dangers of “free speech”, the need for ethics - you know all the things white, male billionaires regularly do. . . https://twitter.com/guardiantech/status/1518821183310860292