You get arrested!
So it seems the sweary non-ticket holding student had been up all night revising. Was diabetic but hadn't bothered to eat properly all day, and had been drinking, all of which affected his mental state. And it wasn't his fault he had been sold the wrong ticket. Victimhood poker at its best.
When I was a student in the 60s we were rebels, we did some daft things, even a few borderline illegal ones, but always we were responsible enough and polite enough never to be confused with the anti-social feral underclass.