There's lots not to like or to get upset about in this article. I'm posting here because I think there are lessons to be learned from this.
First takeaways, know the neighborhood you're in, what's around it, and if you're going to be there after dark, know what it's like when the sun goes down. Or unfortunately, just don't go.
People think they have a "right" to go where they want, which is true, but they often wrongly think that thought extends to "I have a right to go where I want, and not have anything bad happen to me." Which unfortunately is not true. I wish the world was like that, but it's not.
Lesson 2: Don't get out of the car.
Lesson 3: 1 vs 100 is not winnable.
Lesson 4: As pointed out in previous threads, people aren't scared of you, especially when they are in a large group.
I don't know if these types of mob attacks are common (doubt it) or growing (possibly), or it's just the "Evening News" effect, where OMG, I saw this on the news it must be happening everywhere! I do see a fair amount of news stories of flash mob store robberies, flash mob beatings in downtown Philly, etc. Dunno. Someone in LEO with more inside scoop could comment.