Nobody has restricted this conversation to the legal sense.
Is your daily schedule, when you go to work,drop off your kids, what route you take to work protected legally? No, but you probably wouldn't want to share that information publicly either. Yet, in the future, a data breach could reveal such information, and a business could seek to resell it.
If you don't want it released publicly, a better chance is to ask you parents didn't do it when gave you birth. No offense, many places, like small towns will list birth of child on local newspaper if parents sign a form after birth in the hospital among a pile of forms.
It may be discoverable in that way, but that doesn't mean government entities are or should be disclosing names with birthdays en masse. Certainly not the entire country's all at once, which is what the RNC appears to have done.
If there are websites out there sharing that private information, they're doing it without my consent.