Almost everyday you can find news on young children being kidnapped, or die in accidents because the caregiver "looked away for a second." But then there are regular articles like this one, saying children's social development and creativity suffers when they don't have enough unsupervised outdoor free play.
So what's a parent to do? Let them roam free in the neighborhood and risk being abducted and/or get into a serious accident? Or keep an eye on them everywhere and stunt their growth?