No. For example, I would not be able to justify rape because that
directly affects another. Secondhand smoke's effects, by contrast, remain controversial. There are other, little-studied environmental factors about which we know little. For example, what effect do electromagnetic fields from CRT's (TV's, older monitors) have on cytologic function and oncogenetic mutation? With cancer rates increasing (not just lung cancer) we must admit there is much we do not know. We don't know what causes Pancreatic cancer, for example. If we were to eliminate all of the factors that
might lead to cancer, there's a good chance we'd all be locked into hermetically sealed, magnetically sheilded chambers. I choose to enjoy life instead.
Personally, if smoking my pipe in your presence would bother you, I would not do it out of consideration. But sniffing smoke is not going to kill you. It takes years, and years, and years of constant exposure to even have a chance of developing a bronchogenic neoplasm. That chance for smokers, overall, is 16% over the smoker's lifetime. That does not account for number of cigarettes, whether it's cigar or pipe instead - just the mean. Almost everybodys' lungs will heal over time, given the chance.