I'm a former smoker but not militant about it. Like many other former smokers the smell is probably more irritating after quitting. Outdoors I just quietly remove myself from the cloud whenever possible.
However the sight of smoking while riding a bicycle just rankles me. It's like watching a kid pick his nose. Stopping and lighting up doesn't even cause me a second glance.
It's clearly my problem. Completely illogical. Don't even know why I'm posting this. There.. I said it.