It's been a few months since i've seen them, but for awhile, the NW WorldClubs in the hub cities had Dr. Atkins peanut butter cups (a 3 pack) and another Dr. Atkins chocolate snack that was similar to a Twix candy bar. I saw people take gobs of them, seriously somtimes 20 packets of them.
I'm guilty as the next guy for taking a couple of cheese and crackers or cookies, but the only thing i ever did that i probably shouldnt have was to fill a 1/2 pint flask with vodka in the LAX WorldClub for my flight to HNL in Y.