"As for ETS causing harm, do your concerns also carry over to car exhaust? Smoke from your neighbor's fireplace chimney? Your, our your neighbor's, grill?" Yes they do. I avoid breathing any of those and try not to impose smoke from my activities on them.
The jury is only "out" among those who do not want a verdict. How is it that I can always detect a heavy smoker from the sound of their voice and breathing? And why do I feel it the next day after being in heavy smoke?
I imagine the same thing is being said by the Aryan nation nuts right now too.
Show me a preponderance of scientific evidence, even a majority, that ETS causes anything but a minor temporary irritation.
When you can show me that I'll consider accepting the notion that the government has ANY business enacting a smoking ban ANTWHERE except a private residence.
Right now the scientific studies run about 20% for causing ANYTHING and about 80% against.