Wallison, your logic is of course unimpeachable, and my mentioning of studies by scientists and medical professionals is of course completely equivalent to your feeling that they probably aren't right and your fondness for exclamation marks and hyperbole to make your point.
I'm generally quite interested in peer reviewed studies and literature reviews, and less in name-calling. I will admit I haven't done the studies myself but I have more faith in the peer review process than in your gut feeling. It is in fact quite shocking that the accumulations of smoke in a car persist to that level - and would probably surprise many people. Though clearly not enough in your case to persuade you of the view that smoking in cars is detrimental to passengers and in particular to children.
Perhaps you'd like to check out the BMA's work, Evans J and Chen Y in Inhalation Toxicology 2009, the Royal College of Physicians, a group of studies in from the US on tobacco smoke concentration in vehicles vs controlled chambers (Journal of Exposure Analysis and Environmental Epidemiology 1992 has the really interesting one), the Australian Medical Journal, and a host of others I turned up five minutes' worth of Googling, so that you can check out their methodology for yourself and see if it lives up to the exacting standards of your gut feeling.
But then, I'm open to others' evidenced points of view rather than deciding that Taiwan is a country full of human rights abuses with no apparent evidence beyond an anecdote about a song, so what would I know? (By the way, have you checked out the British national anthem recently?)
Redbinneo, well, if you're transporting them by car anyway of course it is safer not to smoke while doing it. I suspect the same is true of transporting them by foot (a number of jurisdictions ban smoking within a certain distance of children's playgrounds or public buildings). And there is evidence (eg a study by the Monash University Accident Research Centre) that smoking while driving increases the risk of a crash.