There is the famous (and with contradictory interpretations) cry from Jean Dieudonné "à bas Euclide !", "Down with Euclide !". His books and prefaces are good sources for strong (and dated) opinions on what is was "good" or "productive" mathematics and what is was not.
I am also curious to know why some of
Doron Zeilberger papers have not been mentionned so farmay contain also some colorful language.