I've kind of stayed away from this topic, as I'm a little afraid to offer 'my' 2c worth of my own paranoid view. I and my wife have had two of our grandboys reside with us for extended periods in the past. Twice, being near to full school years on two separate occasions. The boys are 8 & 9 years of age now, but the last time they resided with us they were 7 & 8 years old. Now, the boys are as mature as any child their age for the most part. Even a little more mature than many their ages.
Now...the school bus stop isn't more than 100 feet from the front door of my house. Most kids using that bus stop are always out there anywhere from 15 minutes to 30 minutes prior to the bus arriving. 'I', wouldn't allow 'my' grands to walk out the door until 5 minutes before I knew the bus was to arrive. And even then, I remained at my window, where I could clearly see the boys, until they actually boarded their bus.
Also, I was watching when the bus dropped them off every day. I watched them step off the buss, and watched them every step to my front door.
It isn't that I distrust the 'boys', it's that I distrust the rest of the world. I know...when it comes to 'some' things, I'm so leary and protective. Maybe far too much so, I don't know but, boy it sure makes 'me' feel better! As for allowing them to walk (even the two brothers together) a quarter mile alone, even an eigth mile? NOPE, wouldn't do it! But...that's just 'me', and 'my' comfort level.