What is the purpose of the “disciplined” badge?
Isn't it a bad thing?
The name of the badge is less than ideal, but the purpose it rewards is important - removing bad posts is a good thing for site maintenance and cleanliness. Sometimes you can edit a poor/dangerous/off-topic answer into a good one, but sometimes it really isn't salvageable. Deleting, then removes it from general public view, and by extension brings better attention to all of the good content.