I agree with most everything you said. My personal take: all the Karma upvoting/downvoting stuff shaped community behavior to a sort of drastic degree - you either say something pleasing/sarcastic to the community and get upvoted or you got buried with downvotes for injecting an alternative viewpoint. After a while, I found myself going along with something just because a post had a massive number of upvotes… not realizing that the majority of readers very rarely go past the top 3-5 comments on a thread. So whatever was on top was usually the highest voted, and it was most often a sarcastic response to a legitimate question someone posted.