Recently, in France, high school studient have revolted. The gouv sent them riot police, and stun grenades have made some of this kids loose an eye or a hand. In the next days, a riot policeman got caught too far from his line by some studients, who used ultra violence on him, kicking his face many times. That is how the gouv decided to remove the dangerous stun grenades. As long as violence is the only way that works, violence is the way to use (unfortunately). If oppression could stop when we say please, their would not be social violences.