It's a subtle thing.
I take it we all benefit if people 1) Argue, but 2) Do so politely and respectfully.
For example, I insist the best possible tempest build is X, you insist it's Y. We offer all the evidence we can think of, other people offer the evidence they can think of, and by the end of the discussion, it doesn't even matter who won, lost, or drew the argument: We have a great understanding of the advantages and disadvantages of each build. In short, respectful disagreements build knowledge.
The reputation system was hurting these discussions. Negative reputation was being handed out on constructive posts, for no better reason than that someone disagreed. At least some of the people who would have participated (constructively) in arguments do care about the reputation mini-game. For these people, even polite disagreement was being penalized.
The damage this does to the quality of conversation is subtle. My suspicion is that there's such a thing as a "passion for internet rightness"-- the same people who care deeply about presenting evidence in an online argument are the same sorts of people who will care if someone anonymously slaps them with negative reputation. If I'm right, the forum culture as a whole was worse off for the griefing that was occurring.
Yeah, I thought that was odd, too. Thanks for clarifying your words.
This is off-topic, but check out
http://www.merriam-webster.com/video...ctvseffect.htm.