I've seen them done well in airports. They have additional extraction and filtering. They are also kept at a negative pressure, so the smoke doesn't roll out whenever someone opens the door.
I've no issues with what people want to put into their bodies. I only take offence when others are forced to be exposed to it.
I'd definitely be the annoying shit on that one. I would insist on proper PPE for the environment. If the smokers in the team want to handle it without PPE, that's entirely on them.
It's also worth noting the smoking rooms are effectively empty, except for lights and some seats. Most staff can avoid it entirely.
Yeah, it seems fine honestly when I'm in places where they're common. I appreciate how we have less substance use than they do on other continents, though, and making it inconvenient might have something to do with it.