I don't see myself or many of the others with 1000+ karma as the kind of people that would enjoy acting as HN police, and it seems like it will introduce internet politics to a community that has managed to avoid it. The net effect of this, IMO, will be that very few comments get endorsed and the quality and breadth of discussion will diminish.
Finally, while we are talking about new ideas, I would love it if HN would track and display not only the net points a comment receives, but also the actual number of upvotes/downvotes. A controversial comment may have 1 net point, but may also have had 50 upvotes and 50 downvotes. Being able to see if a comment I posted was really interesting to people but opinion was divided, or that no one voted and thus the comment simply wasn't that interesting to others, would be be great.