I might not be understanding something about the fediverse, but isn’t this like if you couldn’t send or receive email from a friend because you use gmail Google decided to block @icloud domains?
Like, you’re not forced to follow or interact with it, and are free to block it if you can think of a reason to, I just don’t see why such an open platform used to limit users in this way
You can’t block anything from seeing your posts and comments though. That is point of a free and public space. Defederation isn’t doing what you think it is
Sure, websites could scrape and whatnot, but having actual API integration is a very different thing.