BELOW: Rockslide of the Young X-Men is confused by the instructions of leader/teacher Cyclops (actually the villain Donald Pierce in disguse). Rockslide points out that the X-Men don't kill. Right?
Source: Young X-Men #2 (July 2008): "New Mutants", pg. 9, panels 1-3. Written by Marc Guggenheim. Art by Ray Snyder, Yanick Paquette. See also: heroes don't kill; Rockslide (Santo Vaccarro)