Another angry mob?

Shortly after the incident with the cow, I saw a mob running around and shouting (in a most threatening manner), armed with a badly written sign saying "STOP YOUT VIOLENC". I gather they were a mob of youths, but I wasn't sure whether they wanted me to stop them from being violent, or they were campaigning for violence against other youths to be stopped, or they were campaigning for violence by other youths to stop. But whatever they were, they looked like a violent mob of youths. Not the best thought out demonstration, I think. Olly