Earlier quoted context omitted.
This subthread started with a discussion about how "HN itself also shadow flags submissions" [1]. That's a slightly different form of moderation than the t.co delays. Another commenter argued "Increasing cost of attacks is an effective defense strategy." I argued it is not, and you said adding a delay can cut out bad stuff. Delays are certainly relevant to the main post, but that's not what I was referring to. And I…
Here's another reasonable summary: https://www.revsys.com/tidbits/greet_pause-a-new-anti-spam-f... I get several thousand SPAM attempts per day: I estimate that this one technique kills a large fraction of them. And look how old the feature is...
I don't consider GreetPause to be a form of shadow moderation because the sender knows the commands were rejected. The issue with shadow moderation on platforms is that the system shows you one thing while showing others something else.
Legally speaking, I have no problem with shadow moderation. I only argue it's morally wrong and bad for discourse. It discourages trust and encourages the growth of echo chambers and black-and-white thinking.