Surely we need some context with this, as what we post is basically publicly visible. Even if we defederate the posts are anyway visible. Our IP addresses are probably visible to the home instance we connect to (or our VPN IP address etc) but how does our IP address then travel off with the federated post to someone following us on Threads? It’s only what travels out through the ActivityPub federation.
What would help with this post was, instead of just a link, maybe extracting the two or three issues that look problematic, and say why. That gives us something definite to actually debate.
For those who have friends stuck on Threads still, this maybe a good way for them to stay in contact. The Threads user gets their login times, IP address, location, etc tracked by Meta, and the Lemmy user with their Lemmy app, only identifies with their Lemmy instance. Threads should only be seeing the post and time that a Lemmy user posts something that is followed by a Threads user.