An obviously flaggable comment will get flagged. If you can't say anything other than that then I'm not sure why you'd reply. And anyway, if you can't understand why digging ditches all day is not valuable (after all, look at all the hard work they're doing!) then I'm not sure what to tell you. It's a shame, 4 month old account but still succumbs to comments like this, not sure how HN moderation can fix that.