Which type of behavior is the "disciplined" badge trying to promote?
Why users who deleted their own posts, which had a score of at least three, would get a badge?
I suppose it's for users who wrote an answer that was somewhat well-received but who later realized that their answer had some major flaw and deleted it anyway, knowing that even though they had popular support for their answer, it was wrong and so they had the “discipline” to delete the answer.
I am contemplating deleting my answer to a question on Programmers.SE because the original question has changed so much that my answer no longer applies. I have four upvotes (some of which I have received since the question changed) so deleting my answer would earn the badge. I have not deleted it yet because it helps show the confusion that can surround the entire topic of the question.
I find deleting my own answers wrong especially if others have voted on it, up or down. I feel there should remain a record of what people responded to (especially if it was downvoted, then people can see what a wrong or unpopular answer is).
I can see that deleting a high voted answer takes discipline (do you lose the associated rep?), but I don't get why it is rewarded with a badge.