Several scenarios: 1) They are, in fact, hanging out at HN more than you think. 2) They routinely type their names into the search box, out of curiosity or to

Several scenarios: 1) They are, in fact, hanging out at HN more than you think. 2) They routinely type their names into the search box, out of curiosity or to gauge their publicity. 3) (unlikely) They're continuing the age-old trend of kibozing (see https://en.wikipedia.org/wiki/James_Parry https://en.wikipedia.org/wiki/James_Parry), where they write scripts that crawl and grep for certain terms, so that they may respond. I'm not sure how HN handles bots, and if anyone actually does this here.