I've always felt weird about parents who have those backpack leashes for their kids, but now that I've been living next to my in-laws for a year, who have 8 children, I understand some of them.
I refuse to take some their kids anywhere unless one of them is with my wife and I.
One would absolutely go sprinting full speed away and hide from us just because he thinks it's hilarious.
Two would wander off because they saw something shiny and their brains are like an etch-a-sketches where every time a new thought enters, the old one has to get wiped away.
One would do the exact opposite of anything we say just because he figures he can.
And three others would absolutely just wander off, not because they want to but just because kids aren't always the best at spatial awareness and simply get too far away. And would be terrified if they noticed their adults were nowhere in sight.
In fairness, that's why I feel like getting a leash.
Plus the oldest is 13 and at least she's responsible enough for us to look away for a few minutes and she will still be there.