http://www.youtube.com/watch?v=6qwC_GIRx5o
Young folks who have to go outside their place of employment in order to smoke a cigarette may not know that smoking at work was an accepted practice many decades ago, but anti-smoking PSAs like this one from the 1970s helped eventually turn the tide. Here you can see an unknown Judd Hirsch as an employee who literally puts on a gas mask to protest his co-worker smoking a cigarette in the office.