Replying to the edit of your edit - yes, seriously. HN is a place of discussion, not monologue. We all learn from one another. Just because you were wrong (IMO) about things (especially about cats), doesn't mean that I didn't seriously consider your arguments. I evaluated them, learned from them and decided to reply - even if to express disagreement. You should do the same. Deleting good comments (as in, civil, on-topic) is not the way to go - it hinders other readers' ability to understand the discussion and reach their own conclusions. You're of course free to not reply to comments - but please, for other people's sake, don't retroactively delete your comments.