Eugene Volokh blogged on the 9-year old who's been banned from Little League because he's too good. It got a lot of comments because it straddles some key issues: the right of an individual to try to excel, the safety of others, etc. I offered a comment remembering the old days before organized youth sports when you scraped together whatever kids in the neighborhood were available and willing, whatever the differences in age and ability.
I got to thinking, resulting in the question which is the title. In the old days, kids stayed in the neighborhood unless they could bike elsewhere (our rural roads weren't favorable for biking, even if I'd ever learned). They didn't rely on parents, particularly mothers, for transportation. Now it's different--mothers spend all their time transporting kids so they don't have time to cook, meaning they go for the fast food and carryouts, leading to our obesity epidemic.
So the solution is to ban Little League.