Racking went on at my HS in the ‘70s. Most guys viewed it as a prank but some guys didn’t like it and threw punches at the perp. Like you, I don’t know how the prank is done differently with todays kids. I never did know of any of our students needing surgery or med attention.
For some reason a couple of other articles about this got pulled the other day. Someone sent me the links via freepmail and one boy had to have a testicale amputated. It did not describe what kind of damage he had suffered, but it was pretty severe to require surgery.