Inside, the risk is great... But anywhere outside, the passive smoke from cigarettes is negligible. It wont hurt you any more than car exhaust will hurt you. If you drive a car it releases fumes that can not only hurt a few people but the whole world! Are you a killer? No? This is your logic. Truth is there is very little data on how much cancer is actually caused by second hand smoke. Yes it raises your risk of getting lung cancer/heart disease but so does a myriad of other things.
So don't worry. More than likely, you will be killed by a million other reasons than cancer/disease caused by SHS.
I was a smoker myself. I hate cigarettes. I hate that people smoke. But I know how hard it is to quit. Smokers aren't rational because they are addicted and most cant stop on their own even though they want to... And yes, its as real of a addiction as heroin/cocaine/...
They need help and they don't get it from such arrogant rants. Because that's just how you come across - as arrogant.