Ummm, this shit has been happing for decades breh. Just because you don't always hear about it doesn't mean it isn't happening. In the 80s in NYC they called it wilding where groups of kids just went around randomly beating the shit out of people because they were bored. Same shit for the most part, different name.
I was walking in Chicago on Memorial Weekend with 2 girls a few years back and that damn near happened to me!!
Like 15-20 teenagers circled us on the sidewalk and started yelling a bunch of stuff about me being white and taking my bitches.
I had no options so I took off my shirt and just started acting as psycho as I could, punching myself in the face, pacing around and telling them to step up and by some miracle it dissuaded them from killing me haha.