True, but back to his point, obesity causes cancer as well, so why not ban fatty foods from the park? You say that you find the smell of smoke unpleasant, but I find seeing men and women who are 50lbs overweight unpleasant to look at in skimpy clothes, on the same note, shouldn't we confine them to certain areas of the park as well?
I must say, if anyone has really had their experiences at PKI altered by not having smoking around them must be miserable in public, because regardless of whatever regulation or ban they may put into place, people are going to smoke.