Today's Weird Headline

The next week, shaggy-haired emo teenagers were harassed again by punks and rockabillys

I found this odd sentence in a story about recent anti-emo violence in Mexico. It is apparently very serious as the national guard riot squad has been called out to protect these poor rebellious souls. Is this generation's emo my generation's grunge? What right do rockabillys have to be rude to anyone? And aren't emo and punk similar? Or am I too old to understand the difference? Yeah, that's probably it.