CFAA has been narrowed in scope through legal decisions but AFAIK it still applies to anyone using false information to bypass security measures. In my view, a federal prosecutor could easily make the argument that age gating is a security measure. You’re welcome to be a test case if you disagree!
I do think there is a stronger case against the next under-18 Aaron Swartz, who will get hit with 200 felonies for setting his age wrong (one felony per app/service) after pissing off someone important.
