Are you aware of history at all? Police in Western world have much less power than they used to have. One example was the Riot Act in UK ( http://en.wikipedia.o

Are you aware of history at all? Police in Western world have much less power than they used to have. One example was the Riot Act in UK ( http://en.wikipedia.org/wiki/Riot_Act http://en.wikipedia.org/wiki/Riot_Act ) which gave local authorities the power to declare 12 or more people a riot, and if they didn't leave within 1 hour, they could be legally killed. Protesters have had much harder times than "sonic cannons". Try soldiers shooting into a crowd (e.g. Bloody Sunday in 1972, Northern Ireland http://en.wikipedia.org/wiki/Bloody_Sunday_(1972) http://en.wikipedia.org/wiki/Bloody_Sunday_(1972) )