The power of the mobile many can be used for racial violence as well as for peaceful protest, as proven by the mobs from last weekend in Sydney. via a BBC news story:

Thousands of young white men have converged on Cronulla Beach in Sydney, Australia, and attacked people of Arabic and Mediterranean background…. The clashes follow assaults a week ago on two volunteer lifeguards at the southern Sydney beach, reportedly by youths of Arabic and Mediterranean backgrounds…. Mobile phone text messages began circulating after the beatings, encouraging people to retaliate on Sunday and employing racial slurs.