let us, as a society please learn from the tragedy in zion, illinois. let us learn that it isn't just convicted sexual predators that are the only danger to children. measures to track sex offenders, even if they were to work in the idealized model, would not have saved those two girls. nor would avoidance of strangers. the only thing that may have helped them was their families. that is where it needs to start. families that are aware of what is going on. families that take in convicted violent offenders and don't bother to take responsibility. people who let their kids run free as long as the parent isn't "bothered" for a while.