Well, this should be obvious, but it sadly isn't...
(last sentence was slightly edited for clarity)
If the comment is inflammatory, false or even just misleading, I wouldn't count it under this umbrella.
I guess what I'd say is that most disagreements are honest ones - people coming to different conclusions on subjective things - and that's the kind of disagreement I don't think downvotes should be used for.
So for a post you'd have 4 buttons:
- Good (which says 'this is a high quality post that adds to the conversation' when you hover over it) - Bad (which says 'this is a low quality post that detracts from the conversation' upon hover) - Agree (with the title being 'I agree with this post' on hover) - Disagree (with the title being 'I disagree with this post' on hover)
You'd then have only the 'Good' and 'Bad' options give or take away karma points (without the score being visible), and the number of people who 'Agree' and 'Disagree' would be displayed near the post separately in some way.
Either way, I feel like the XenForo reactions/Slashdot ratings system probably works better if you want to avoid the upvote/downvote abuse that sites like Reddit have, since they make people think about why they like/dislike a post rather than treating it like a binary matter.
I think the system we have now works well for the thing it's designed to improve.
Either way, after the divisive last few years I don't think that that many people care for downvotes anymore, i.e. for what "the other side" thinks.
Slightly related to the topic of moderation and this forum, the people behind it should really do something about allowing users in here to delete their comments/past history. We’re only a doxxing event away from making the news (this forum was no better than Reddit when it came to the Boston bombing, as an example and talking about doxxing).
Downvoting for disagreement was absolutely a norm here 2010-2012. You'd have been chided for giving a reason to your downvote then.
The deletion of comments and comment history is a perennial topic; you can search Dan's comment history to understand the rationale behind our policies on it.
But I frequently downvote disagreement where it seems to me that the comment also reduces the overall thread quality.