The Passer-by Phenomenon

Guess passer-by is quite a famous identity in blogging world now. He/she "passes-by" blogs, and leaves a "bomb" comment, that would drive the site owner mad (or near-mad) and started to flame back frantically, so as the site's fellow readers.Interesting phenomenon isn't it.Here are 3 examples that I came across, where site owner, coincidentally, reacted to the "passer-by" in a similar way, by