Thanks for the writeup, it helped me see things from your perspective. I don't fully agree, but I get now why you're asking for this.
What I'm wondering now is, does the fediverse actually support the kind of block that's being asked for here? Like, is there precedent on this being implemented on other platforms like Mastodon or Lemmy? The issue here is that kbin isn't in control of who sees your posts, I wonder if it's actually possible to implement this in the first place.
This will do a lot to prevent stalkers, because even if the stalkers realize they need to log out to stalk the user, they now lose every "follow" function, every logged-in function, and have to stalk the user manually.
If you actually believe this, you're a bit shortsighted. This is the fediverse, people can just jump onto a different instance. And even on Reddit multiple accounts for the same person were allowed.
People can also run their own personal instance which doesn't honor those blocks.