It would be interesting to dig when did you open the account. Because up to a certain point, the User Agreement said “You must be at least 16 years of age to register for an accountand use the Service. If you are under the age of 18, you hereby represent that you are using the Service with the consent of yourparent or guardian.”
They then changed it to exclusively 18 years old.
EDIT: Oh well, in 2002 it was already “you must be at least 18 years of age” =/