You find someone smoking outside as you walk by them a nuisance or whiner? Damn, how much smoke can you get as you walk by? It is like people have been brain washed to believe cigarette smoke is much worse than any other kind of smoke. It is not. Smoke is smoke. It is part of the environment and it all leaves residue when enclosed. Walk through a house that has had a fire in it. It smells bad. But, there is no getting away from it and the outside air is not any more toxic from cigarette smoke than it is from exhaust fumes.
The CDC disagrees, I expect their research is a bit more extensive than yours. They state as a MATTER OF FACT : There is no risk-free level of exposure to secondhand smoke. Paul YOU ARE WRONG !!!!
https://www.cdc.gov/tobacco/data_statistics/fact_sheets/secondhand_smoke/health_effects/index.htm
The American Lung Association disagrees with your hyperbole
http://www.lung.org/stop-smoking/smoking-facts/health-effects-of-secondhand-smoke.html
The American Cancer Society disagrees with you.
https://www.cancer.org/cancer/cancer-causes/tobacco-and-cancer/secondhand-smoke.html
Seems the Australian Medical association also disagrees.
https://ama.com.au/ausmed/second-hand-smoke-linked-obesity
WebMD says those who smoke outside should do so ( AS FAR AWAY FROM OTHERS AS POSSIBLE ) not right outside the door where everyone walking by has to suck in your poison.
https://www.webmd.com/smoking-cessation/effects-of-secondhand-smoke
Pregnant mothers are warned that even the residue left behind poses a hazard. ( Third hand smoke. )
This is echoed by the American Cancer Society above: Particles that settle out from tobacco smoke have been shown to combine with gases in the air to form cancer-causing compounds that settle onto surfaces. For instance, NNK and PAHs (polycyclic aromatic hydrocarbons), carcinogens that are known to cause lung cancer, have been found in dust samples taken from the homes of smokers. Research has also shown that third hand smoke can damage human DNA in cell cultures and impact blood clotting in lab animals.
http://americanpregnancy.org/pregnancy-complications/second-hand-smoke-and-pregnancy/
--EDIT---
The only thing tobacco is used for is to maintain a destructive addiction, it's not like cars that people do sometimes die in but also have a very worthwhile use.
Still I support peoples choice to poison themselves as they choose, just so long as they don't poison others in the process.
If smokers walk outside and around the corner of the building and I walk out and smell the smoke, that's what I call reasonable, I used to smoke, I understand, I will accept that, but clustered around the doors we all have to use is a problem, it makes a thicker cloud and it has an impact that adversely affects people/childern, take your poison 20-30 feet away as diachi has the good manners to do and I have no problem, well I don't like it, but I respect your freedom enough to suck it up....literally.