smokers vs kids - not always easy because you don't necessarily know if you're amongst smokers when you sit at a table. But if we were sitting down first, and then a smoker came along and lit up right next to us, I'd ask them to stop or move. Or more likely, just sit indoors in the first place - seems a shame on a nice day, but for the other 9 months of the year, it works in our favour so can't complain too much.