[rmbyrro]

I think this is analogous to diseases and vaccines. You don't immunize a child by exposing it to the pathogen, but to a modified version of it that poses no threat to their health, but still allows their immune system to recognize and produce anti bodies.

The same applies to teaching "street smarts" to kids. You don't do it by throwing them in a hostile environment where they'll be prey to hostile people without having any defenses built up first.