"Please drive safely"

Near the intersection where I work there are two lanes and a turning lane for each of the four way stops. Sometimes there are 12 cars stopped at once trying to figure out who is suppose to go next. Needless to say, its a nightmare to drive through. Today, on my way to work a woman was literally STANDING IN THE MIDDLE OF THE INTERSECTION wearing a shirt that says "please drive safely" while dodging cars. I swear, in the 4 minutes near the stop I think that I saw her jump out of 4 cars ways. My question, why put yourself in that situation?! She was literally causing accidents, not preventing them. It makes NO sense!