I can't believe there is no question about this, but I didn't find one. What should I do, if there is a question Q2 answered by user B which is literally copied from the answer to a formerly posted question Q1 answered by user A?
Well I voted it down, set a comment including the explanation and a link to the original. But I am not sure if I should flag it for moderator attention. Obviously it is no spam and there is no one offended (directly), but it lowers the quality of SO, it is plagiarism and thus not fair. On the other hand if question Q2 is different from Q1, it is no duplicate.
To flag or not to flag, that is the question. ("copied" from Shakespeare :-)
EDIT: I found this: How to deal with answers exactly copied from other SO answers but no advice about flagging it for moderator attention.