It's pretty much this same mentality that leads to me not giving a shit about tobacco companies. Yes, they make a product that's bad for us. But we know this. It's no longer the 1950s where they can get away with making people think it's good for us. The same goes for fast food and so many other things we do that are deleterious to our health.
If you don't want to face the potential consequences of something, stay the fuck away from it -- claiming ignorance of the facts is no longer an option because we're constantly bombarded with the facts. If you smoke, and you do it long enough, you're going to get cancer and die, or probably face some other negative health effects. If you eat enough fast food without mixing in some moderation or exercise, your health is going to suffer. At this point, with as much as we know about this shit, I have no sympathy for you if you get fucked up, and, in fact, I'm kinda hoping that you do end up sick and/or dead.