Say I post a bad answer (out of oversight or ignorance or who knows what). Then I recheck the page after 5 minutes (or because the envelope icon has turned very bright) and I discover that the answer collected 5 downvotes.
Then there are 2 things you can do:
- be a man and take the pain
- delete the answer
Most people I see this happen to, delete their answer. Why? Because if they let it stay, within minutes it might get downvoted another 10 times.
I think on the other hand, bad answers are informative as well and should be kept. Especially since they probably get a comment underneath to why it is a bad answer.
So I think there's an imbalance here right now. Wrong questions are taken away as fast as possible by the people who answered them, the moment they realize it was not a smart answer. Yet, you really want the bad answers (and the comments why it is bad) to be visible since others might have the same wrong reasoning, and now don't know why it is wrong.