I am not a Marine, but my thought is that the Stress Cards will likely stay undercover. Samy guys just said that DI's can't *make* you do anything, but they can make you *wish* that you did.
I wasn't a marine but admire the corps. I was in the US Army (1961-63), whom I also admire. Out "relatively easy" training included jogging to the rifle range for 3 weeks (an 8-mile round trip)and a 3-day bivouac on a rocky slope in a pup tent in the rain and cold of now-defunct Fort Ord.. Once at the firing range we fired M-1 Garands without ear protection. The noise was literally deafening, my right ear being over the stock, nearly on top of the firing chamber. I tried putting cotton in my ears to salvage my hearing. The sargeant on the line asked: "What are those for?" "To protect my ears, sergeant," I replied. "Who told you to put them in," the sargeant demanded. "Nobody,sargeant," I replied. "Get 'em out!" he growled. That's how the Army made men in those days. Men who lacked their upper-range hearing, but men nonetheless.