I personally feel as if its like polluting the fediverse!
It can’t be ignored. It’s outlined in the thread privacy policy that any form of interaction with one of their posts, be it upvoting, boosting or commenting, will allow them to create a surveillance profile for your account, and let them associate it with other Facebook/Instagram/WhatsApp data they might already have and use it to serve you ads and ‘personalised content’.
Their policies are contagious, meaning that for example if kbin defederates from threads, but lemmy.world doesn’t and they can still see each other, meta can still gather information about you because your posts reach them through lemmy.world.
Fediverse must absolutely block threads and every instance that doesn’t defederate from meta.
This is all on the open web. If they find it useful to create surveillance profiles of fediverse users they will do so, whether we defederate or not. That’s the current price of being on the internet.