Okay then, lets take this a couple of steps further.
Suppose a) A smoker always goes outside to smoke (thereby causing damage only to themselves)
b) An obese person indirectly harms their children by providing high fat snacks and high sugar sodas causing their children to become diabetic.
Which one is the worst sinner? Is it judged by harm to others? Harm to self? Respect for life?
This is the slippery slope of legislating what is a sin and what isn't. What is a disfellowshipping offense and what isn't.
And I'm not even getting into pot smoking which is far less harmful than cigarette smoking. What about pipes and cigars? Is occasional use more harmful than drinking? Than over-eating?
ackack