Would it be unreasonable to ask the to push off?
Stood in a queue for the bus, person stood in front lights up a cigarette, as does his mate. Wind blowing in my direction where I'm stood with pushchair and pre-schooler inhaling all their toxic fumes. I can't leave the queue because I will loose my place (pushchair places are limited and on a first come first serve basis), so I reposition the pushchair and try to move DS1 as out of the way as poss.
Would it have been unreasonable for me to ask them to stop/move? I didn't say anything at the time because I didn't feel I had a right to, but on second thoughts, maybe I did?