It could also have to do with LL's shortsightedness in the variety of kinds and types of age authentication items in various countries. While a US ssn, driver's license, etc. are all well and good (and seem, to work), I have a Canadian friend who just can't get the stupid thing to recognize her driver's license and she's older than I am! C'mon, Canada's right THERE, LL, it's not like it's far from CA (where you're based).
Anyway, she eventually was verified through some other means, but as far as places putting specific restrictions on ID because a minor can get hold of a debit/credit card number? That's a ridiculous reason because a minor can get hold of ANY piece of ID and use it without a parent's knowledge. There's never any guarantee that a person using an ID of any kind is the actual ID holder.