In some parts of the world this thing isn't even an issue, and are being used for medical purposes. Don't disrespect those who need it by saying it's a poison.
This.
Nobody is judging those of you who don't for not smoking. Considering alcohol/tobacco/caffeine all have more debilitating longterm effects, no need to be judging folks.
(And I'm not judging any of the above; I am a caffeine addict no question, I quit smoking cigarettes 2-3 years ago but smoked for almost 20 years, and I drink on the regular
)