You're not allowed to say that on HN (I don't disapprove of you saying it however and I've said the same thing myself - the point of my comment is that it's ridiculous to disallow comments like that)
The rule for it is pretty straightforward, to quote dang about it:
>As I've tried to explain many times (https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...), there are two problems: (1) real abuse is happening on the internet; and (2) internet users frequently imagine that they're seeing such abuse when in reality they are merely seeing something they dislike. Both problems are serious, but for entirely different reasons, and we need to be careful not to confuse them, since (2) is extremely common, indeed is the laziest internet production that exists. Allowing people to do #2 everywhere (so to speak) could easily destroy the community.
>Fortunately, a simple rule turns out to suffice: don't post accusations of abuse unless you have some bit of evidence to go on. Someone else having a different view than you does not count as evidence. You need at least a shred of something objective, and if you don't have that, then you can't post accusations. Since the overwhelming majority of #2 posts have no evidence, that rules them out. Getting people to actually follow this rule is a different issue of course.