Yeah as an Australian I thought this would be the case and I'd have to stop using Facebook etc (because there's no way I'm uploading ID or whatever to keep using it). Turns out because I created my account over 16 years ago they're happy to assume that I'm at least 16 years old. Which makes sense but I didn't anticipate it going that way.
Also what we see here in EU is that some sites (e.g. porn sites who already have to use age verification) demand it periodically, probably so you don't create one and give the credentials to a minor or something.
In fact it's becoming pretty insane here, even my bank and phone provider want me to come in and show my ID every few years. As if I suddenly became another person?? I kinda snapped at them last time because of these retarded processes and I felt bad then because I know it's not the employee's fault but it's just so ridiculous. I'm getting so sick of this pervasive tracking and monitoring in society with everything we do.