tptacek has the most karma on HN (even moreso than pg): https://news.ycombinator.com/leaders (for reference, pg has 149712 karma at the time of writing; tptacek has 165020 and the next person has 88887) His opinion is respected by many (and many accept what he says without question). A retraction by tptacek reminds us all to think critically
lawnchair_larry's comment is equivalent to questioning the president or a major celebrity, which oftentimes isn't a personal grudge.