When I look at the flagging queue I see almost one flag reason only: Not an answer. (At this very moment 440 out of 470 flags!)
I have the feeling it is used wrongly most of the time. Many seem to flag wrong answers as NAA. How can we make this wrong flags disappear?
We could introduce an new flag reason: Wrong answer (deactivated for choosing).
With an explaining text underneath - something like this
Wrong answers should be downvoted and not flagged. You can also leave a comment and ask the OP to clarify or improve the answer.