Rap, hip-hop, dumba** scream metal, whatever it is, it's indecipherable noise created by emotionally stunted oxygen thieves that have devolved to below sea cucumbers on the food chain. As another FReeper earlier said, they are just more living proof that our society is circling the bowl, headed for the sewer of history.
But what the hell...their makeup/masks will make them easy to identify WTSHTF.
Scouts Out! Cavalry Ho!
Actually, in times of civil unrest it's filth like this who do well. They have no compunction about violence or theft, their cowardice makes them move in protective packs and since they have no one that they are willing to sacrifice for or protect, they have no emotional qualms to exploit.
It's those who have compunction, standards and vulnerable loved ones to protect who are at a disadvantage.