I've personally been physically assaulted in Kalihi twice in my lifetime.  Both were attempted robberies and both involved young males.  The incident involving a one-on-one confrontation ended with the miscreant fleeing after I produced an improvised weapon.  The other involving multiple assailants didn't end as happily for me (but neither did any of them make off with so much as a dime).

Your mileage, as they say, may vary.