My friend from indonesia they used to have own self-guarding volunteer group in their estate. each family will have their male adut registered and have a duty schedule for the patrol around the estate.Any suspecious person moving around in the area will be observed and questioned by the patrol team. They did have own simple self defense equipment such as baton and peper spray.
During the riots in 1998, they even pay money to the indo army to protect them, and they acquire some fire arms from the army and build a wall to protect the housing estate. I am not sure how truth is the story but my friend did show me a picture while he carrying a m16 riffle with a few of his neighbour guarding their estate back in 1998.He said they managed to shoot and disband a group of mobs which trying to break in their estate.shots were fire and people in the mobs got hitted. then later no mobs dare to attack their estate till the end of the riots....
i think we can pick up some good experiences from the indonesian chinese, they are good in unite together and protect themself from the monkies.