Busy, shopping, lots of people crowded together type of thing. Then, you're walking along and having to pass people who are standing having a fag outside stores or walking along the street smoking and you have to follow in their smokey wake 
I used to smoke and can understand that people like a fag, but surely they can hang on till they reach somewhere less crowded before they light up.
It's also annoying for ds2 who is 6 to have to walk along and get a face full of smoke when we walk past because of people standing with cigs.
Am I turning into one of those annoying militant ex smokers, or am I reasonable to feel angry about this?