Look, if we were working at a local 7-11, and some guy dumped an armload of propane cylinders, matchbooks, and Sudafed on the counter, our first thought (assuming that we even put forth the effort to analyze what he was buying, which is a stretch) would be that he was going camping and had allergies. If he then told us to "hurry up" because he had to "go home and finish a cook," then we would assume that he had just run out the door, perhaps leaving a tin of muffins in the oven, and he wanted to get home quickly to finish them so he could take them on his camping trip. Never, ever, under any circumstances, would we make the connection to a meth lab without a suggestion from a third party. Never. It just wouldn't occur to us.