There's an episode of Penn and Teller's Bullshit that I adore, because it debunks the belief that second hand smoke = OMGDANGER, but dude... deal. Some people who go to restaurants and the like might not want to, oh I dunno, stink and it does seriously screw with people who have allergies and asthma, so bugger off and chew some gum or something.

Please to stop making us smokers all look like wankers?

...*mops up*