I've had blog posts that are a direct result of my interactions with several HN members. HN is a great catalyst for debates. Thus, sometimes I write what I write because of an idea picked up from a discussion that originated here. However, I wouldn't say I'm tailoring my content for HN either, since, generally, I write so that others (i.e. people outside this community) can at least understand what's the topic at hand and its repercussions.