What are the most downvoted questions and answers on Stack Overflow, Server Fault, Meta, and Super User history to date?
Similarly, what are the most upvoted questions and answers on SO, SF, Meta, and SU to date?
For all others, here is the comprehensive list.
Disclaimer: These have the most up votes, and may not be the highest scoring. There is a difference.
This was the most down voted answer in history. Notice it has a ton of up votes. Now it's this - with far fewer up-votes (but still more up than down...) For all others, here is the comprehensive list.
Disclaimer: These have the most down votes, and may not be the lowest scoring. There is a difference.
As for the scores (June 3, 15):
The lowest-scoring question is Don't close questions where the user has requested that it not be closed (MSE, -157), the lowest-scoring answer is Info: Contacted by spammers (Ispirer Systems) referencing Stack Overflow (MSO, -269).
The highest-scoring question is Why is processing a sorted array faster than an unsorted array? (SO; +11,226), the highest-scoring answer is Why is processing a sorted array faster than an unsorted array? (SO; +16,359) (the answer to the above question).
That includes two down-votes from me as well.. :)
The lowest voted answer in the past 30 days is This at -17. To go back farther you would have to consult the data dumps that are made publicly available.
Edit: I was also able to find This One currently at -21.