Isn't it pleasant when science backs up intuition? We just read a study published in the Journal of Experimental Social Psychology. The study reinforced a belief that we already held; what we wear not only influences the way others treat us, but also influences our self perception and actions.
In the study, when research subjects wore lab coats they made about half as many attentiveness test errors as their peers. Scientist found that test performance was only affected when subjects were told that it was a doctor or scientist's coat, not an artist's coat. The research suggests that, "it depends on both the symbolic meaning and the physical experience of wearing the clothes." The article cites other clothing perception studies and denotes that "The clothes that we wear have power not only over others, but also over ourselves."
Just like the lab coats in this study, Pins hold a strong symbolic meaning. They are symbols of excellence that boost confidence in the person that wears them. That boost has the power to make people happier, accurate, and engaged.