Actual astroturfing, when it occurs, is an abuse of HN that we crack down hard on. Defending this community against gaming and abuse is a huge priority for us. Any user who thinks they might be seeing it happen on HN should email us right away (hn@ycombinator.com) so we can investigate.

Imaginary astroturfing—the bug that causes some users to be certain that those who disagree with them can only be nefarious shills because otherwise the pure reason of their own point of view would be fully accepted—is also an abuse of HN. This one is orders of magnitude more common, and it is poison. It eats away the heart of civil, substantive discourse, the assumption of good faith on the part of others.

Therefore we ban astroturfers, and we also ban users who accuse others of astroturfing or shilling without evidence. An opposing view does not count as evidence, and playing this card as a rhetorical device in an argument breaks the HN guidelines.

We detached this subthread from https://news.ycombinator.com/item?id=13607640 and marked it off-topic.