I quite understand your sensitivity and objections, Mauvepink. I had a neighbour when I lived in my previous house who smoked constantly. She was a lovely person and I often went there for a cup of tea. But her house, her car, her breath and her clothes absolutely stank. When I got back home I stank too. I never allowed her to smoke in my house. Eventually a cancer scare forced her to stop smoking, and the difference was wonderful. She later asked me did her house used to smell. I was honest and said that everything smelt, but now it was fresh and pleasant.
I would like the law to be changed to include all public places outside as well. I was waiting at a bus stop and a young woman in front of me was puffing away like a chimney. The smoke was blowing right into my face. In the end, I firmly but politely asked her to either move away until the bus came, or put her cigarette out. Of course, I got a stream of abuse to accompany the smoke, but she did sidle away a little. When the bus came, she chucked her still-burning fag onto the pavement. I don't think anybody has the right to discomfit or risk the health of anybody else in public. And it has to be said, when these people are seriously ill from cancer or heart disease etc, it's our taxes which have to pay for their care from NHS funds.