I am not judging. We all have our vices. I eat far too much, and of the wrong foods, for example.
But ...
I had a coffee date yesterday with a man from the dating site. It went reasonably well, and I was in two minds about whether I wanted to see him again. However he messaged to say that he'd left his scarf at the pub where we met, and as it's round the corner from where I live, I offered to pick it up for him.
Thing is, it is absolutely reeking of smoke, and is stinking out my flat I will have to put it on the washing line outside, but hopefully it won't rain as it's lambswool. I sent him a semi-jokey message asking if it would be fair to assume he's a smoker
, and he replied that he was.
My settings on the site were set to 'non smoker' but when I checked his profile tonight, he's a social/occasional smoker. I must have missed that!
I'd rather his 'thing' was drinking, as he only ever has an occasional whisky. No sharing a bottle of wine over dinner for us! 
So, would you date someone who smoked?