HN could reduce (but not prevent) upvoting of unread articles by removing the upvote button from the HN home page (so you can only vote after having opened the

HN could reduce (but not prevent) upvoting of unread articles by removing the upvote button from the HN home page (so you can only vote after having opened the HN thread page and seen some comments) and/or requiring the user to click the article link before the upvote button appears (so the user might have read the article before voting).