Funny you should mention that. I routinely raid the condiment supplies at fast food restaurants, especially taco bell. They are just the ticket for my edc and bob and for my grub boxes as well. They all have relatively long shelf life, and by nature are very stowable. In fact, I'm able to stave off hunger fairly well just sucking down a couple packets of TB's fire sauce.
Other great ones are Pizza Hut's dried pepper and cheese packets, mayonaise packets (actually contain a surprising number of calories per packet), salt and pepper packets, and McDonald's towelettes.
It is part of a bigger scheme of raid other gratuitous single serving type items. For instance, I snag on those extra individually packaged tea bags at business meetings, individual dose packets of tylenol and Ibuprofren in the first aid bins, those little half &half coffee creamers they bring with breakfast, along with those jam, jelly and honey packets they bring to your table.
Yeah, sometimes I can be kinda cheap. But at least I am thinking proper. Maybe it's borderline ethically, but I don't think it is stealing if it is being offered complementary anyways and was factored into the cost of doing business already. Greedy or over-indulgent maybe, but not criminal.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)