Buy a gun. learn to say fuck you ese. And I'm not sure of the spelling but tu chinga du madres means go fuck your momma to them. It's the same as Motherfucker in English, but they take it literal. I've used it on construction sites a few times and they don't like it. As for the gang thing, that like in prison, Don't be a pussy if this shit happens again and fuck back with them. Play some ACDC at 5AM with some 12" woofers laying on the floor of the apt. Did it at Auburn to some neighbors all the time. I know the thread is closed, but this is what I would have done.