This is being upvoted? Really? This sort of completely negative, non-constructive comment on HN bothers me a bit. If you dislike an idea, say why you dislike

This is being upvoted? Really? This sort of completely negative, non-constructive comment on HN bothers me a bit. If you dislike an idea, say why you dislike it, don't just say "this is dumb", or words to that effect. I don't agree with the idea either, but this is HN, not Slashdot/Reddit/Digg/whatever.