From news.yc guidelines:

Please don't insinuate that someone hasn't read an article. "Did you even read the article? It mentions that" can be shortened to "The article mentions that."

This is a useful rule, but sometimes the best response to a comment is to point out that that an assertion is refuted by the linked content. That's especially true when the comment being responded to is a commentary on the rhetoric and content of the linked article.

First half of GGP comment was fine. Second half not needed/actively negative, IMO.