If anyone here is stupid enough to test this theory, be my guest...
But remember one thing - Cancer, Bronchitis, Asthma, Emphysema, Stroke, Fertility Issues, Coronary Heart Disease & Peripheral Arterial Disease that smoking causes or is linked too are not limited to 30+ year olds... if you think smoking for 10-15 years will not affect you in the future because you stop at 30... you seriously need a reality check.