Poor wording on my part. People are saying things like 'unless I made my account when I was 3, my fifteen year old account should be enough'. Fifteen years of gaming history on the other hand is reasonable evidence of the account holder's age.
In my example, My son will have a 15-year-old account by the time he turns 17. I made them because I thought it'd be a fun bit of clout when they start playing with their mates. 'How do you have a 10+ year badge already?'.