You're willing to support a broad censorship program that will affect everyone and harm marginalized people because you snooped on some kids on a train in a narrow, non-representative slice of their lives. You know nothing about them, but you act like you do.
I never snoop like I said. And yes I know about kids because I was a kid too! and have suffered the same. Only people living under a rock will act fully dumb when predators harm kids through online methods.
I was a kid, too. I could spot and avoid the predators because my parents made sure I understood it was a risk, knew how to spot them, and knew I could trust them with any questions I had.
In reality, I encountered more predators offline, but had the skills to deal with it.