I’ll add to hendrik’s sibling post … it seems you’re relatively new to the fediverse. You may want to get a feel for the place before advocating for such wide reaching actions.
I’m all for expressing your feelings on an issue, but I do wonder if your eagerness is a bit premature. I myself “called for” defederation early in my time on the fediverse … and it was dumb of me.
Since then I’ve come to view most arguments around the idea of defederation suspiciously. There’s usually a bit of personal drama or a shallow opinion or people who want to loudly voice opinions without wanting to put work into making this place better. Usually, if defederation is actually needed, the admins will know before you do and it will be obvious.
All that being said … I’d ask you … what do you think federation and decentralisation is for?