[clarie]

Further to Chris T's post, consumption of alcohol does not affect the health of the person you are sitting next to. Exclusions to this might be drink driving and violence/abuse caused by alcohol. However, those incidents are minor when compared to the deaths caused by smoking - and furthermore with the ban on smoking we are talking really about protecting the health of non-smoking strangers. If a non-smoker chooses to sit with a smoker, then they take some responsibility for the effect it may have on their health.