"Renegades who rush around lollygagging pedestrians only make things 
worse. "You're contributing to chaos," he says. "Crowds are 
self-organized systems, so when you don't cooperate, the system 
breaks and you slow everyone down." "

http://news.sciencemag.org/sciencenow/2010/04/secret-of-annoying-crowds-reveal.html

www.peoplewho.org