You never told me this so I didn't know, short of email there is now way to contact you without a public post either. How would I know you would consider light humor in that specific context (with positive upvotes) "low quality", the humor and sarcasm behind the rate of poor quality products from Google resulting in a continuous stream of HN posts like "Tell HN:Help, google locked me out" was the value in my comment, if I don't know that you consider something like that low value and why that is, I will just continue to post the same type of comments forever? There are many ways you can show me my account is in such a state as well so I can evaluate the quality of my post.
Again, I don't criticize the measures you take just the lack of transparency and communication. I have no desire to debate your rules, just to undersrand them so that I can follow them.
I think you know like a sibling comment mentioned, how easy it is to just create a new account or be hostile/uncooperative. If you prefer that, your plan will work with most people (and eventually myself unless my writing style gives me up). Shadow moderation is an act of hostility which is unfair when we are being cooperative.