I have the exact mindset, I think people who blow that smoke in the air that people and even kids breathe are jerks.Thankfully I don't know of any. I would not play in them if they did allow it.
There are few people I dislike more than smokers who think it is okay to blow their smoke in the air other people have to breathe.
It causes cancer - take that risk for yourself - don't give it to other people.