Um, my mother graduated in a class of13 students in a rural Midwest school. She told me about their senior class pranks, which aren't that far off from this, adjusting for time and location.
Can you give a specific example? Because otherwise the caveat "adjusting for time and location" sounds like a convenient fudge for "not remotely similar". I google "senior pranks" with words like "crime" and "extreme" and plenty comes up that was deemed newsworthy but nothing remotely similar to mass strong-arm robbery and assault.
Note that to be remotely similar requires acts on par with criminal physical violence against dozens of people in a crowded public place where armed police officers would be very probable. Pranks that merely involve property crimes are not remotely similar.
Well, stealing a teacher's car would probably count as grand larceny and likely would have resulted in time in court, minimum, by today's standards.
That was one of the milder of the pranks.
No one gathered a group of 60 kids to invade a subway train and rob a few people. For one thing, there were barely 100 kids in the entire school 1-12 (no K). Also, there were no subways or any kind of public transportation. So no one did that because they literally could not have.
I'm serious that what my parents and their peers did, routinely, at school would in today's world merit suspension at a minimum and more likely, time in a juvenile facility. But ditching school, taking livestock up the stairs to the top floor of the school building (which necessitated a great deal of intervention as cows and horses do not like to go down stairs), stealing the teacher's (their favorite teacher!) car, disassembling and reassembling the principal's car on the roof of the school building: they were seen as childish pranks. Not as the work of criminal masterminds. That same teacher whose vehicle was stolen as a senior prank? He came to every single class reunion until he was well into his 80's and died. And the instigator of that prank? He became my high school principal.
Now that I think of it, my mother in law, a city girl through and through--she and her friends ditched school, shoplifted, and played all manner of pranks as well.
My husband and his friends participated with great enthusiasm in the streaking craze of the day. Multiple times. Often in circumstances that involved trespass and many traffic violations. Also fleeing a police officer (while naked). Vandalism, of various houses of worship. Hopping trains. Petty drug use, minor consumption. Those kids grew up to be things like college professors, CEOs of Fortune 500's, doctors, lawyers, etc.
True stories.