It would be good to provide a link. I've been through the last 8 days of pg's comments which you can browse here and haven't seen anything to that effect:
http://news.ycombinator.com/threads?id=pg
Discussions will end up quite boring if people use votes to agree or disagree rather than expressing their point of view in a reply. I tend to think of votes on HN similar to the options for moderation on Slashdot: vote up for insight, vote down for off-topic or flamebait.