parents can be held liable for buying their kids cigarettes but, similarly, tobacco companies are (at least nominally) not supposed to target children in their advertising campaigns and in the design of their products.

It's obviously not a 1/1 comparison here, because providing ID to access the internet is not analogous to providing ID to purchase a pack of Cowboy Killers but we can extrapolate to a certain extent.

(inb4 DAE REGULATING FOR-PROFIT CORPORATIONS == NANNY STATE?!?!?!?!?)