Not to sound rude, but I don't know what your normative culture is or why any of us should care what you think is rude on the internet when you lack the self awareness to know that etiquette has no objective basis and is always contingent.
You could skip the disparaging characterizations and make your case for why you think it would be a good guideline. Ie, because it is confusing and non-linear, not because of a bunch of motivations you've inferred about a stranger.
> etiquette has no objective basis and is always contingent
But what it's contingent on is what's actually manifest rather than some speculative hypothetical that seems a contrivance to nullify the applicability of any etiquette anywhere.
FWIW, the previous commenter's points that adding edits to an existing post in order to reply to comments further downstream is confusing and impolite behavior. It's useful on Reddit in response to malicious use of the ill-advised 'block' feature, but doesn't fit on HN.
You could skip the disparaging characterizations and make your case for why you think it would be a good guideline. Ie, because it is confusing and non-linear, not because of a bunch of motivations you've inferred about a stranger.