This is what happens when you make it personal, though. I try to let being right be its own reward, not a license to tell people how wrong they were.
lawnchair_larry's comment is equivalent to questioning the president or a major celebrity, which oftentimes isn't a personal grudge.
That makes for a wonderful experience really. I interact with this nameless entity and each post is largely valued by its responses (I often leave an article open for a few hours to let the comments ripen a bit, that also adds a lot).