What's the Deal?

I've been in school at Athens Tech for about nine months now and I see something everyday that really gets on my nerves. Every break between classes there are these young women dressed in scrubs standing around smoking. Now, I support anyone's right to smoke; it is a personal choice, as long as your smoke isn't fouling up the air that the rest of us have to breath, but when you are going to school to be a nurse you are choosing to help promote people's health and well-being. Part of that should also be a commitment to your own personal health. How can you do something that you know is very bad for you, more than just very bad, one of the worst things that you can do for your health, and expect anyone to take your health advice seriously? I wonder if any of them are respiratory therapy students? Maybe they want to be able to treat their own smoking induced respiratory problem.