So Volcom is making a clothing line based on the hyperkinetic kids' TV show Yo Gabba Gabba! That's vaguely interesting, I guess. Slightly more interesting: The clothing line will feature art from famous people like Wayne Coyne, Biz Markie, Devo's Mark Mothersbaugh, Jack Black, Napoleon Dynamite's Jon Heder, and Dave Grohl with his daughter. But the real reason this whole ...