I am on kbin.social. I worry that if kbin doesn't defederate from Threads, maybe kbin's servers will be flooded with Threads data (i am not techy, so maybe this would be a minor issue). Also, if someone in the Fediverse but outside of Threads starts communicating with someone who has a Threads account, will the non-Threads person now have all of their data that's now on Threads servers collected?
If I understand correctly, your content on the fediverse is already public (DM’s, posts, etc.). So that data is already collectable. What Threads / Meta can’t get is the rest of the info above in the original post, and tie that to you.