@SolSoCoG I would rather prefer the site do not take a stand on this issue, and let the user decide whether they want to block another site.
Personally, I treat anything and everything I put on social media sites as public, and I would like to keep all my posts accessible by anyone else, including Meta products‘ users.
Technically, blocking Threads does not improve privacy. If Meta wants to collect data, all they have to do is to create a crawler pretending to be a mastodon instance.