They shared sexually explicit images in whatsapp groups. You consider that similar to having personal thoughts nobody will know of or written stories?

"were completely terrified and had tremendous anxiety attacks because they were suffering this in silence."

Have you dismissed this quote? I don't know where to start explaining how it's different from what you described because of how far off it is. I have no idea where the baseline is to argue from.

Humans are a social creature. We form groups, and want to be part of groups. Teens are especially vulnerable with a developing personality, social norms, and social belonging. Breaking norms and violating common personal barriers and control of self-expression and self-presentation is deeply violating in a vulnerable phase of life.

They didn't create a personal collection. They shared in their social groups.