But they should be aware that the bulk of the damage that smokers, drinkers and the obese do is to themselves, and not to others.
Erm... really?
"Alcohol 'more harmful than heroin' says Prof David Nutt" [https://www.bbc.co.uk/news/uk-11660210] based on his research available here: http://www.ias.org.uk/uploads/pdf/News%20stories/dnutt-lance...