Nope. How else are they supposed to make comments if they didn't have an account here yet? I had to create this account just to answer you—is that suspicious too?
Their comments are extremely high confidence (failing to recognize that accidents and supply chain attacks do sometimes happen) and because they are new and posting frequently in the same thread, their account shows the signs of a bot/disinfo campaign (which does happen on HN).
You and anotherlogin448 have neither, but also show incredible aggression towards anyone pointing that out.
Your confidence might actually be warranted, but there's no reason for any one of us to take you on your word, and neither of you have given anything else.
No, but if you were to make 6 more comments under the same post all saying the same thing in an overly confident and aggressive tone, it would be.