I'm pretty certain that tobacco causes more harm than a donut.
Let's put this into a scenario; A crazed mad-man kidnaps a kid and yourself and tells you that you must harm the kid using the two methods he will provide you. The two methods are making the kid smoke a single ciggy or have to eat a 12 pack of donuts, fresh from Krispy Kreme comprised of chocolate, strawberry and caramel dreamcakes - warm and (ok, sorry, got a little carried away).
Anyways, my point is, your point doens't really stand up because cigarettes do more harm in less time and the effects aren't always visible. They're addictive too. Donuts on the other hand, you'll usually see the results of the harm that's being done and they aren't addictive.
can we start a 'post of the day' thread?
