It's a shame those kids started smoking in the first place. The issue of kids starting to smoke should be addressed not how to facilitate their addiction after they have one. I feel the same about harder drugs, alcohol and gambling. If they do want to help the ones who smoke how about educating them, after all school is for education isn't it? Or how about putting them into a sporting class which isn't optional so they can feel their lung capacity improve or how hard it's become to actually 'breath' from smoking.
PE seems to be an "specialised subject" now. Some schools have no PE teacher, and very little PE happens. it's no longer "part of the curriculum". PE has been squeezed out, to pay for computers.