You are setting a bad example for your children and are practicing child abuse by forcing your children to breathe polluted air. It is a fire hazard for you and your family and it raises everyone's insurance rates. This does not make it a wise thing to do and only a small percentage of those who tried would survive. Your grandfather was one of those fortunate enough to survive. One thousand people die every day of the year due to smoking related diseases or fires.
Smokers are inclined to point to the few survivors who have smoked a lifetime.
Yet smokers fail to consider the millions who have succumbed at an early age to cancer, heart disease, emphysema, and other diseases related to smoking. Also, don't forget those around your grandfather. Secondhand smoke kills thousands of Americans every year and causes a great deal of eye, nose, and throat irritation. Smokers risk not only their health, but also the health of those around them as well. It's your establishment, and you have a right to restrict smoking to protect your employees, your customers, and your merchandise.