Already being done, and yes they're fighting it
Since only the community can take control, it is the community that must be punished until it's members learn to apply that control. While punishment should rightly be first against property, people will defend their property and many so called "innocents" will die.
I'm sure you've heard of the (some would say draconian) rules that residents in government-supplied housing can be expelled if any co-resident is convicted of a drug offence, even away from the residence. This sounds like exactly what you call for: punishing the community in the hope that they will be able to exert the control over their own members that the government hasn't been able to.
Although, as with the Middle East problems being a byproduct of our oil dependance, the power of the LA gangs is a byproduct of the war on drugs. If we could fix the root causes -- reduce/eliminate our depepndance on (foreign) oil, decriminalize drugs (thus taking the money out of it) -- we would probably see the problems solve themselves much more effectively than we have managed.
