That is the most asinine thing I've ever heard! I was driving a '57 Massey Ferguson 65 when I was in 4th grade (and riding my '80 Yamaha GT-80 over to the farmer's house so I could drive the tractor!) He spent a lot of time "showing me the ropes" of brush hogging, plowing, cutting and raking hay. Once I really got the hang of it, we would go to a "job" and he might make the first few rounds just to make sure I didn't tear off the sicklebar cutter on a big rock or stump that he knew of, but then he would turn me loose and go do some other task for a while and come back when he figured I was about done. It was a great experience.
Shoot, I remember a high school kid who lost his driver's license and instead drove one of their farm tractors to school every day!
It continues to amaze me how stupid our politicians really are when they come up with this schiznit.