If cigarette companies can create a cigarette that is proven not to produce secondhand smoke, then I will glady change my perception of cigarettes. It'd be the equivalent of doing heroin, as opposed to doing heroin while simultaneously injecting everyone around with a deadlier form of said heroine.
Sorry if I sound like I'm trying to take the moral high ground here, but this should be seen as a very black-and-white issue. When you smoke, you're inflicting harm on other people.