There was once a time in America when the term "vegan" or "vegetarian" meant that you were likely a snobby new age hippie but these days it probably means that you're just too afraid of the industrial chemicals found in most foods.
Reading the back of a nutrition label (for those that actually bother to read it) is more like reading the Periodic Table than reading actual food ingredients. And nothing proves that more than foods that can be confused with industrial strength caulk, (although I'd take cheesy flavored caulk any day over a fried candy bar).
Plus, some foods out there that look like they were made by people who've watched a little to much Texas Chainsaw Massacre. Who else would come up with an idea as demented as stuffing two dead birds into a bigger bird? Even people like Leather Face would recoil in horror at the idea of eating pickled pig's feet.
However that pales in comparison to fear people experience when they see drivers who try to have a three course meal while speeding down the freeway. So unless you want that lukewarm processed burger to be your last meal, either wait 'til you get home or move closer to your favorite food spot.