You're right, it's not illegal, but there's been a MASSIVE chilling effect on outside play. Of my daughter's friend group, she has by far the most freedom. She's got free reign over our neighborhood which has two parks, a school, a couple lakes, and even a small wooded area kids can venture off into. But none of her friends are allowed to play outside. One friend of hers, 12 years old, is not allowed to ride her bike in her own driveway without a parent outside with her. Another friend of hers, 13, has never been allowed to spend the night at a friend's house. All of these other parents think I'm the crazy one for letting my kid play outside. She usually chooses not to, because it's hardly any fun to play alone.

I know, anecdata and all that, but it's really crazy out there.