This wasn’t a case of “stranger danger”.
“He was so sinister that he also conducted a scheme that would allow him to gain access to children who were growing up in single-parent homes, to position himself as a person to be helpful to a single mom,”
This was a case of grooming an entire family. First the mom, then the kid. Creating a trust between himself and a parent, so that he could be seen as the good coach who wanted to help out these kids, and their mom’s.
I’d be willing to bet each one of these boys heard about the danger of going with strangers, or talking to strangers, but no one ever told them the danger might actually be someone their parent trusted.
There’s more in the article about how he approached and groomed the kids too. Go get educated.