Told you so, years and years ago. Repeated it over and over. "Mastodon is building a spam gateway so big you can drive a fleet of starships through it. Eventually the spammers will discover this. This is not a matter of 'if', only 'when'. "
Tried to enshrine comment permissions in OStatus and ActivityPub before either were widely deployed. People laughed. Evan muzzled me and prevented me from speaking out. Cwebber ridiculed me publicly. Gargron ignored me completely.
So here we are.
Folks it has only just begun. Streams and Hubzilla will survive. Don't know about anybody else. Stop building fucking spam gateways.