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Threads is officially starting to test ActivityPub integration
(www.theverge.com)
This is a most excellent place for technology news and articles.
That's a good question. I don't know. My guess is that you could be exposed to Threads content you don't want in the same way you could be exposed to Mastodon content you don't want. I can't imagine they're not set up to respect blocks, mutes, or server suspensions though, right? They have a way bigger problem than Threads if they don't.