Kids are smart enough to get around age limits. Many parents don't understand tech enough to set them up correctly to begin with.
When lawmakers realize this doesn't really help in a few years, they will then demand that we begin uploading ID's. It'll be a small step since so many readily capitulated with the OS intrusion.
Honestly, our gov't supports genocide, illegal wars, and protects child abusers instead of prosecuting them. Why trust them?