Wow. Some interesting points in this thread. Let me relate one.
This VERY last weekend, I sold my old AC 190XT. The kid that bought it has a tree service. I had a tree that needed to come down. Needless to say, he worked off some of the purchase price by felling the tree. He agreed, as an added service, to use the tractor to haul the bigger portions of the tree back to my burn pile, before he took it home.
He was hauling, no kidding now, the very first limb back to the burn pile. He had his 2 year old daughter on the seat with him. He was rounding the burn pile, trying to get the limb in a better position on the burn pile, when a tie rod end broke. He lost control of the tractor and ran partially up on another limb, that was on the burn pile, from a tree that had been cut down last year. This incident ended happily. No one was hurt, the tractor was repaired and is now in her new home.
When I was a kid, I spent many an hour riding on the fender of a tractor while my grand dad or uncle farmed. When I was about 12, I remember my grand dad putting me on the road, alone, on a tractor, pulling a bush hog from his house to his land, about 6 miles away. Grandma thought he was nuts. She followed me all the way, in her car, with her flashers going.
Things are different now. I won't say we have gotten smarter because, speaking just for myself, there would be a lot to be argued with if I were to make a statement like that. I guess maybe I am just more cautious. I don't know, exactly.
When my 3 year old grand daughter visits, this summer, from Colorado, I may saddle up a horse for her and lead her around the pasture. I might let her go wading in the pond. I might put her in the wagon and pull her around on the tractor, but she will not be riding on the tractor with me.
I know we can't keep our kids safe from everything. Who would want to? What kind of life would that be? My own boys were driving cars and pickups down country roads LONG before they were legally able to do so. But I am not taking chances with my grand daughter.