There is a question on StackOverflow posted today (Apr, 26th) that I flagged as duplicate of another question (answered Feb '11), have barely the same question.
At any rate, I've answered the question, providing both the answer to his specific case and pointing the url of the duplicated question.
My answer had already 3 upvotes and a moderator deleted my answer and did not flagged as duplicated.
Just for the sake of examples, here is the today's question (duplicated IMO) and here is the 2011 one (already pointing to the correct answer).
And the deleted answer was:
Mostly duplicated of http://stackoverflow.com/a/4991591/684932
In your example, this will work:
$('div > span:not([class])').remove();
So the question is:
How can we know what were the reasons for the deletion?
I've read some questions about this and normally the other moderators answered that they normally post a comment explaining before delete. This wasn't the case.