I read through that article - naive and idealistic. I guess only a first-world citizen will believe it works. And not to put you down - I admire your innocence that you think this will work. This all breaks down as soon as someone from outside the community or someone powerful in the community introduces drugs which kill, a crime boss decides to beat up a few people for protection money, poor people or addicts decide to invade homes to steal your stuff, folks involved in 'community policing' decide to flex their muscles and make their 'fair' judgements which favour their own. You will feel utterly helpless.
Maybe you think all this won't happen. I have lived in poor and powerless communities earlier in life and seen all these things happen without a proper police presence. I had my sister assaulted when I was young and was unable to do anything about it. I despise 'community policing'. The cliques it creates is far worse than the full hammer of the full armed forces.
Anyways, I wish USA the best of luck. I really hope the looting and rioting in NY stops soon.