A few thoughts ...

We are in a far better place now after the smoking ban in the UK - it's just common sense.

The smell of someone who smokes may be unpleasant to someone who doesn't - just as offensive as bad wind, body odour or some kind of downstairs infection ... and one should find a way to deal with the problem of a smell they don't like in the way they normally would! The mere smell of stale smoke does not constitute a health risk.

Nicotine in itself carries a similar heath risk as caffeine does - it is definitely the combustion by-products that are the main causes of health concerns with smoking.

Regarding people finding e-cigarette use uncomfortable because of the risk of normalising inhaled nicotine products - can I draw an analogy with singing songs about hunting foxes and whales? Just because something is traditional doesn't mean it is good ... but it doesn't mean it needs to be banned too if it is no longer harmful - and by preserving cultural links with our past we retain a knowledge of where we've come from. I think that singing is a more valuable link to the past than drug-taking rituals ... but if neither harms anyone then it is probably better to stop trying to intervene in other people's lives.