You can appoint yourself chief of Bunkie and ride around looking for evildoers. The more affluent neighborhoods will hire mercenaries. The ghettos won't change a bit.
Those fools in Minneapolis will get what they deserve if they do this. Feel for the good honest people of that city.
The collapse of the entire Judicial system & American business. Neiborhood policing? You could shoot any of these people getting "Up in your bidness", knowing No Police will ever come. Without Police, there are no more criminal trials, which require Police reports to even get the judicial system rolling. Round the clock looting for years. Business? Maybe out of your home for awhile, that's about it. Until somebody wants your computer &/or money or your wife & shoots you, without any Police interference.
Nah .... it’s about to be clash of the titans. Antifa vs Feminist! No police means free pun tang, and no permission required. Feminists ain’t gonna have that. You’ll see the Democrats wearing MAGA hats as they team up with Republican to oust Antifa.