Marines don't dimple because of a peculiar guy named "Sergeant Major." The man who decends from the heavens and gives a Kiwi enema to any poor sap who commits the heinous act of *gulp* walking on the grass, or putting anything other than air in his cargo pockets, does not take kindly to any interpretation of P1020.34_ other than the one he learned in 8511 school.
So, if I'm feeling like a rebel (or just having a bad day), I'll wear my pisscutter cocked to the right side like my WWII Gyrene forefathers. Perfectly legal, and gets a few looks from the old-timers. It is my way of walking on the grass with my hands in my pockets.
Semper Fi, Mac...