Re: Second-hand smoke and cancer -
Ask any statistician who actually
looked at the results of the studies that allegedly "proved" that second-hand smoke causes cancer, and he/she will tell you it's all a batch of bushwa. (This is not to say that it does or doesn't, only that the studies do not, from a standpoint of statistical validity, establish the link.)
It's (IMHO) more a matter of paternalistic control freaks who know what's "good" for you and have somehow managed to get into a postion of authority sufficient to allow them to inflict their opinions on the rest.
(Now, Counsellor, tell us how you
really feel about it

)