I’m not worried about dependency on content from threads. I’m primarily concerned with facebook’s data harvesting. I have a Facebook account, but I only touch it when I have to. All other aspects of my social life are pretty much divorced from Facebook. I fear that with federating, my activity will populate on their servers and they will feel completely entitled to all of it to train their AI and create advertising profiles without any consent. All of our activity will be free use for their profit.
I’d actually feel better if the process of federating required an EULA or something where the instance seeking federation must deny any right to use community content without explicit, signed permission from individual users.