It's high school, and a public one at that. Cheating can be rampant in some schools or with some individuals.
What I find ridiculous is the parents are suing over a C+ vs B grade and a detention on the record. Like where do you see your cheating kid going in life that you're going to waste your resources and the district resources on this?
I find it completely unsurprising that parents who would sue to change a C+ into a B raised a kid who would cheat.
We elected a felon and frequent financial cheat as President, so the sky is the limit, I suppose.