@gruff @happyborg honestly I haven’t found much around. Everybody seems to hysterically yell “we all must defederate Threads, otherwise everybody’s privacy will be diluted!”, which means that few probably have a clearer picture of the settings already available and how cross-instance content forwarding works. I may work on putting together this information in a more articulate stand-alone post.
Disclaimer: this information is based on my understanding both of the protocol and the available settings, which in turn are based on on skimming through the source code myself. I’m not sure if other loopholes are available (for example posts cached on other instances and indexed), so I’d love to get confirmation from someone who has contributed to the Fedi more than me.