While the recent X-Men: Schism series revolved around the morality of making soldiers out of young mutants, the series ignored the biggest danger of allowing teens to be X-Men: the costumes!!
Travel back with me to a time when young Kitty Pryde designed her own super-hero outfit (Warning--NSFHE (Not Safe For Human Eyes)):
And leave it to Magneto to make the realization it took Wolverine 30+ years to come to:
Kids should never design their own costumes!!
(Oh, and obviously, Wolverine's right, the X-Men and New Mutants never, never EVER sent teens into combat...except for every issue ever.)
Panel from Uncanny X-Men #149 & #150, art by Dave Cockrum, Josef Rubenstein & Bob Wiacek and Glynis Wein.