What's even worse than that sort of murder is the senseless drive-by shootings. These used to be gang-on-gang, but in time, the gangsters began shooting innocent citizens as a way of initiating new members, and even for the sheer hell of it.
My sister lost her future brother in law to a drive-by shooting when she was in high school. He wasn't even involved with gangs. Just standing in the wrong place at the wrong time. A convenient target.
The utter contempt for life is what really is disgusting, and just as with terrorism, the only "measures" that will get any attention or "respect" from these bullies is what every coward fears--someone with something bigger and stronger than them!