FWIW, IIRC, the cigarette companies used to advertise about how good cigarettes were for you. Yeah....if you smoked Marlboros, you got to be just like the magazine ad....you could wear a cowboy hat, own a horse, and have some emaciated bleached-blonde following you. ;)
I vaguely recall someone from a tobacco company saying years ago that smoking cigarettes reduced the risk of colon cancer. I have no idea where they got their "data", but that ranks up there as one of the more irresponsible statements of the 20th century.
Kevin