I hadn't heard of this policy until now. I've seen very many comments make similar claims in many discussions and I didn't see this response. I just checked the Guidelines and it's not discussed there. Please consider how a user would learn about it - I'm pretty active and I haven't seen it. One possible source of miscommunication: Users probably see only a tiny fraction of what you do, and you could make this comment 100 times and maybe only a fraction of users would come across it at all.
But it's especially disappointing to read the accusation, which has no basis as far as I know. I've always been respectful of the mods, other users, the forum, and its rules, even when I think they aren't great ideas (inevitably, nobody will agree with everything). If I had known about this policy, I would have respected it too. I don't know how I was cast into the role of an antagonist. Like anyone, I don't appreciate loose allegations about me.
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> You can't make insinuations of astroturfing or shillage on HN without evidence
I don't quite understand the policy as stated. I understand not accusing individuals without evidence, but I certainly didn't do that even by implication. Half my comment was a question asking if there was evidence that it happens in other places, not HN. I also raised the possibility of it happening here, but clearly was unsure and 'insinuated' nothing; I meant simply what I said. If not even that is allowed ...
But to be clear, my concerns don't mean I won't respect your forum's rules. (However, uncertainties will make it more likely that it will happen unintentionally)
EDIT: Moved paragraph with questions of general interest to your post at the top of the discussion.