It's in the context of what the original link is about. In your example: Another comment on this thread simply states "Newegg is my hero!". How come you're no

It's in the context of what the original link is about. In your example: Another comment on this thread simply states "Newegg is my hero!". How come you're not lecturing that commentator? "Newegg is my hero" is a comment stating that the user likes Newegg because of what is being described in the link. While not extremely useful, the comment is directly related to the subject being discussed. Whereas, "I don't like Newegg because they screwed up a return." is both not useful and also has nothing to do with the topic being discussed. It has as much to do with the story as "I don't like Newegg because an employee once cut me off on the highway." Not to mention that with sites like HN, it gets old fast when people use every mention of certain subjects/people/companies as a catalyst to air any unrelated grievances they have just because. Imagine (this is a fictitious scenario) that joshjdr reposted his original comment in every thread mentioning Newegg, regardless of context. That sort of stuff can be frustrating to wade through regularly so people tend to react poorly to comments that appear similar in nature.