Leashes save lives.
For those of you familiar with grand Canyon National Park, you know that the Park Service has put safety walls and fences at the edge of all that scenic beauty. The Grand Canyon has nearby, however, a smaller probably even more beautiful offshoot canyon called Canyon de Chelle (pronounced "shay"). While making the Grand Canyon look like a bid ditch, there are no safety barriers on the trails.
Many years ago, my wife's family made a day trip up to Canyon de Chelle. We had a number of the children with us, and had resolved that anyone under the age of 10 would be leashed off to an adult. On the trail up to the canyon edge, we passed a pair of old bitties on the trail who - in stage whispers between one another - commented on how barbaric it was to tie children up like they were dogs. Rather than pick up the thrown gauntlet, we just continued up the trail, keeping our mouths shut.
As we got toward the end of the trail, my nephew Christopher - was about 8 or 9 - was getting excited to get to the canyon edge. He started running at the end of his leash, and my wife's father - to whom he was tied off to - was running to keep up. Something distracted Chris as he rounded a corner, and the next thing he knew he was dangling off a 200 foot cliff with "Grampy" being dragged over the side with him by his momentum. It took 3 of us adult men to stabilize grampy's footing at the edge of the precipice, while one more laid down and fished Christopher back onto solid ground. As we were pulling him back up, around the corner came the two old bitties. The looks on their faces said everything their voices couldn't.