What could go wrong? Lunatics are running the asylum it seems. Authority is always here. Disband the police and you will get another arbitrary authority (being gangs, some kind of political repression, and so). There already are no-go zones in Europa where the police don't go anymore, believe me, you wouldn't want to live there. If you don't want the official police anymore, why not starting with your place, your hom…
There’s plenty of precedence for replacing a broken police force with one which actually works properly.