People have become accountable to just the government, not the rest of us. As M A X said, people would step in if rules were violated in a fight. This doesn't happen anymore because of mostly the threat of lawsuits. For some, it might even be getting arrested trying to help (the result of the "arrest them all and let the judge sort it out"). Criminals don't fear the "average" sheep...err... citizen. They probably won't do anything anyway.