Great thread!
When I was in my quit smoking classes,,, our materials made a big deal about how the tobacco companies added other things to cigarettes to increase the addictive qualities of cigarettes, and to manipulate the way they burned, etc. The trump card seemed to be that they contained arsenic. I asked our group leader the obvious question,,, why wouldn't they do something to force the tobacco company's to take those added chemicals out of the product??? She didn't have an answer of course.