PORT-AU-PRINCE, Haiti (AP) — Old cars, used tires and barbed wire block off the biggest neighborhood in the capital of Haiti.Gun-toting gangsters have been robbing, raping and murdering the innocent. Weak or corrupt police and officials have done little, or worse.Now, the people are taking action and a wave of brutal vigilante justice is roiling Haiti, concentrated in this capital of about 1 million. The vigilantes close off neighborhoods. They stone and often chop the limbs of suspected gangsters, behead them and set them afire, sometimes while they are still alive.Vigilantes have killed at least 164 people since the movement dubbed “bwa kale” began in April, according to the United Nations. The name means “peeled wood” in Haitian Creole and insinuates male dominance and power in street slang.