I personally think you're right: it was written overly broadly and allows for things that Little League would never do in practice. I think they're a good organization and didn't mean any evil when they set this up.

That said, the end result is a pretty bad combination of things. It's a little annoying but not the end of the world when I start getting spam for batting cages after registration. It would be a whole different animal if I started getting ads for medicines based on the medical records I had uploaded to register. (Hypothetically speaking, of course; I'd never upload anything that sensitive, and I don't think Little League would ever actually do that.)

Interestingly they never asked for proof of age. I think that happens in person with the coaches, but I haven't thought about this since about a year ago and didn't really pay attention to remember exactly how that worked.