I am suspicious of these studies. Rarely do I see one published for the general public with all the info on how they determine these things. What is the sampling size of the group studied? How long was the study done for? What was the age of the participants studied? What is their health history? To me it is a convenient study to try and scare people into quitting smoking by going for the penis so to speak.
I have also lived long enough to see many things go from good to bad to good again. Eggs, blue food coloring, M&M's, etc. You name it there is probably a study showing it as good or bad. If these people really believe their study shows something then put ALL the information out on the table for the public to see. Not just in medical journals for other researchers.
Finally, what the fuck is wrong with this country? Why are there so many people who want to tell you how to live, what to eat, etc.? I know smoking is bad for you, no argument there but what is this incessant need to control others? Also how come nobody gets upset about alcohol and the deaths it causes, or cholesterol, or smoking weed? Listen to me, it doesn't matter whether you are smoking weed or tobacco. If you think that weed growers don't use all sorts of stuff to enhance their product or concentrate THC levels then you are living in a dream. Tobacco is really modified I know but taking smoke into your lungs, regardless of where it comes from, is bad for you.
Here is something we all need to remember: Life is supposed to kill you. You are going to die one way or another. Why should we let a bunch of anal retentive assholes tell us how to live our lives? We have enough laws to cover all the stuff we shouldn't do like murder, stealing, identity theft and all that. Do we really need more laws that will subject us to one groups' personal ideals, feelings, or religious beliefs? Plus, for every person who bitches about smoking, I want you to give back all the tax money you have used from cigarette taxes. If you believe so strongly that smoking is bad then don't be a fucking hypocrite and make money off the backs of people that are dying.