Earlier quoted context omitted.
I have to show ID every time I buy anything at Costco, regardless of whether I pay cash. I'd also note that Facebook is an age-restricted product.
> I'd also note that Facebook is an age-restricted product. Only by their policy -- whereas for alcohol it's the law.
Facebook most likely doesn't mind the current state of affairs where preteens lie about their age (hook 'em early), but they do not officially condone it.