At least in the United States, smoking is something fewer and fewer people take up these days. This obviously wasn't the case back in the 50's through the 80's, where cigarettes were commonly smoked out in public.
So whenever I see a period movie or show, filmed in the 2020's but taking place in the 60's, there's frequent scenes where characters are smoking cigarettes in a bar or stress-smoking to the filter after a stressful conversation. And I think to myself, "are these actors all smokers? In this day and age? Or is that an unlit prop ciggy with VFX smoke done in post?"
Are fake cigarettes common in film production now, or are these still typically the real deal?
It’s usually what’s called a “lettuce cigarette”. No tobacco in it.
https://www.news18.com/news/buzz/what-do-actors-actually-smoke-in-movies-and-shows-director-explains-4289945.html
So you still have to take smoke into your lungs, but it’s not forcing a tobacco craving to start.
I don’t even think it’s going into the lungs especially with non smokers. If you try to inhale smoke as a non smoker you’ll most likely cough your lungs out. I assume they suck the smoke into their cheeks and blow it out from there.