shrug most people on HN are professional engineers of some type or another. If you want to make this about "creds", you're free to look up mine.
To the experts in the field in question these comments are usually incorrect and often highly amusing, but they are stated with such gravitas and certainty by the poster, that a casual reader might mistake them for the truth.
Also: https://www.mobygames.com/person/68015/glenn-fiedler/
Note that MobyGames is wildly incomplete.