How do you resolve this other than telling kids "don't send nudes", arresting them, or punishing them with detention/suspension? And yes, sharing hundreds of nude photos is definitely different than possessing photos of just one person you're in a relationship with, but you can't selectively prosecute based on that semantic. Either teens sharing nudes is illegal, or it isn't. Coming down hard on just the boys, for example, would be ridiculous and sexist, since it seems half the kids with photos circulating were guys. If I'm a parent and some other parent insists on dragging my kid into court for having their photos, I'm dragging their kid into court for sending them.
The only people outraged by this are 40+. This is how teens use phones now. Don't want your kids sexting? Don't buy them a phone.
Best idea is to decriminalization for people under the age of 18. Of course the parents would never allow that, because the idea that teenagers could have healthy and private sex lives is un-American.