It was said better in another recent comment thread (I forget where): HN comments these days are full of people trying to sound like experts when they have no idea what they are talking about. I post about twice per day, max, and I think that's already more than I deserve to be able to say. Maybe that's what could be enforced here, so that people would really think hard before wasting a comment on hypothetical asides or repeating the same thing ten other people said.