Whilst your three points would indeed be bad, they really don't seem to be born out by reality - this is not what we see happening on HN. Slashdot style one-li

Whilst your three points would indeed be bad, they really don't seem to be born out by reality - this is not what we see happening on HN. Slashdot style one-liners are not common, and generally speaking fare poorly in the karma stakes. You also seem to be labouring under the misconception that the quality of a reply is proportional to its length. However, a short, pithy remark that cuts to the heart of an issue is far more valuable than a long-winded argument that makes the same point.