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shnaek said
"I believe in personal freedom and choice - those great things that we are born with and man is not entitled to take these freedoms from his fellow man."
I also fully believe in these values. However, we are all free to exercise our personal freedom and choice only so long as it does not infringe on the human rights of others. Of these human rights, the right to one's health takes precedence over the right of another to exercise their personal freedom and choice. I'm pretty sure somebody can find a reference to the UN Charter for Human Rights that will back this up.
An example: if Anto the boy racer likes driving fast, he is totall free to exercise that personal freedom and choice by renting out a private racing track where he can rally away to his heart's content. However, if Anto were to engage in this sort of wreckless driving on public roads, his actions would be putting the health of others in jeopardy. For this reason we, as a consciencious society, enforce laws to prevent Anto from exercising this particular personal freedom and choice.
Another example is racism: we are all entitled to voice our opinions through free speech, but a civilised society outlaws racism as it infringes on the human rights of others.
So, apply this to the smoking ban: Anto aslo happens to be a smoker. He is perfectly entitled to smoke in his own home, and in doing so damage his own health. However, he is not entitled to engage in this behaviour in a workplace as this would mean that his own personal choice is damaging the health of those people who work there. We are all entitled to conduct our work in safe environments, so Anto is not permitted to smoke in the workplace.
I agree that sometimes a law should change, though this should only happen when there is a clear consensus amongst the population. Those of our ancestors who fought against British rule were fighting to change the law, but they had the backing of the people. The smoking ban is supported by the vast majority of the people, therefore there is no justification for breaking it.