Oh this was grown adults. Not kids. Just very ignorant grown adults! Usually if there's only one of them smoking, I'd just tell them to shift, but you can't really do that when there's 6 or 7! 

I know its annoying and you can't do anything about it.

My bus stop has signs saying it is illegal to smoke in the bus shelter (well it did, but the windows are put out on a regular basis so the sign has disappeared)