Set My Birthdate

Record the caller's own date of birth.

Under 16 on the consumer product blocks the account rather than deleting it: the row stays so support can correct a mistyped year, which is the whole reason the refusal names an address to write to. A school's student is never blocked here; their date feeds the guardian-consent flow instead.

The session is NOT revoked on a block. The blocked person has to be able to read the explanation, and the explanation is served to an authenticated caller; signing them out would replace "here is why, and here is who to email" with a login screen.