It's not absurd to worry about it, it is absurd to say there is no safe exposure level and leave it at that. Especially because so many people smoke it is important to be informed about the actual risks of second hand smoke.
If I'm walking down the street do I need to cross the street if I see someone approach with a cigarette? If I'm at a bar and smell smoke coming in should I leave?
If I'm walking down the street do I need to cross the street if I see someone approach with a cigarette? If I'm at a bar and smell smoke coming in should I leave?