Oddbean new post about login | logout mastodon is nice in theory- i would not consider it open- its been manipulated to be controlled by a few- anyone can cancel ur instance from the "fediverse" through a centralized block list- its total bs imho- worse than a company adhering to a TOS🤔😉✌️
There isn't a centralised blocklist. Each instance can choose whatever it wants to block. The closest to a centralised blocklist is that admins can choose to share a blocklist with others if they wish. I'm an admin of a Mastodon server. There's the option to "import" a blocklist as a CSV, but no more defined method of blocking instances exists in Mastodon.