But the feature does automatically inform the person, just after the fact.

I was ignored by someone I don't even know, after I had written a response to their post. I don't mind that I was ignored, but feel the fool to be the last one to know.

It's not just common courtesy, the "Huh?" of being suddenly locked out gets me wondering what I missed, why didn't I know, what's wrong with me when it is the blocker who should be assuming 100% of the responsibility.

My mental health is important too and it's hurtful to talk behind people's back, so-to-speak, by doing a "Watch this, I've blocked her, she doesn't know it and is probably gonna try and post, tee hee". I have no way to find out I've been blocked from my replying (not the same as their blocking reading me, they can already do that). A person blocking can read, write, block, unblock, whatever. A person blocked can read and then write and then get told, "sorry, you're not wanted here, go somewhere else" (if they'll have you). I would be happy to go play somewhere else but tell me before I try to play with you! I'm reaching out and getting my hand slapped. Am I going to reach out again? What if that next person has blocked me?