osymandus
Life President
Unfortunately it can be very difficult to differenciate (sp?) between peaceful protesters and the trouble makers. If you don't herd them like cattle, then they will do exactly the same, funnilly enough, as unherded cattle, and spread to the four corners and then cause bigger problems...
Actually if you don;t herd them teh none violent ones run off , thus exposing the violent ones easier or making them scatter quicker thus preventing damage. Ruins great photo opportunities .