Feedback from First Questions and First Answers is not really anonymous
While certainly the vast majority of first posters will not know how to access the information, as can be seen in the gif
above, it is trivial to identify who provided the "anonymous" feedback. Moreover, experienced users may also form opinions about users based on their feedback. Security though obscurity is not really security.
Perhaps there is an alternative wording that more clearly describes that the feedback is less immediately tied to you but doesn't call it "anonymous"?