From time to time, an Stack Exchange newbie will answer a question, then sometime later they come up with new information; however, in some cases, they don't simply go back and edit their original answer; they instead post a new answer below the first one in that very same question.
One example is this answer on unix.SE.
I am scratching my head why double answer posting is permitted to begin with. Shouldn't Stack Exchange prevent people from posting twice?
As Bill the Lizard mentioned, we already have a pop-up warning about double posting; my suggestion is twofold, either:
- We limit people to one answer per question.
- If we are not willing to limit to one answer per question, I would suggest that multiple answers to the same question is a privilege that is earned after X number of points (500 points seems right to me). This would prevent new users from blindly posting things others need to clean up later.