@shironeko I'd recommend going through the linked conversations about potential approaches, but in my mind, I'd imagine each server would reject replies that don't match the reply settings.
Yes, there will be servers, either running outdated fediverse software, or designed to ignore the settings, and the replies might be visible there, but their reach will be limited.
Obviously you can't stop people from talking about you in their dark corner far away, just like screenshots easily work around quote permissions. Or someone writing a blog post about you.
Still, what we have now is pretty subpar and I've seen too many people leaving the fediverse because they feel unsafe and unwelcome. And they tell their friends who will never come here.
This has to change.