DNR, but the 6 yr old is a little young, depending on how far away he/she was roaming, imo. However, my kid has had full run of a portion of our neighborhood, within eye sight, of our house since he was 6. That said, he had to tell us what he was doing, where as, the radio said that this specific set of parents didn't require him to report to them.
What is silly is how different we, as a people, feel about our kids and their safety regardless of the level of freedom and trust we were given as kids.