What about this, for a 90% solution: comment scores are visible to everyone, except people that have commented on the page. Skimmers can get useful information

What about this, for a 90% solution: comment scores are visible to everyone, except people that have commented on the page. Skimmers can get useful information, but those involved in the discussion can't easily get obsessed with points, they'd have to ask a friend, or maintain multiple accounts (maybe have a karma threshold?). Scores would have to be invisible to those logged out as well, and HN Scrapers would have to agree to delay publishing scores 24 hours.