No but look how hard they try and now they have a feature they can wiggle around with if something bad happens. It's theater as always with stuff like this. There is just no way of doing it without real inconvenience for every user. Inconvenience really hurts the bottom line...
There's no cheap way of doing it without inconvenience for every user. Rather than age checks, they could just remove the CSAE distribution groups, appropriately moderate abusive conduct, and so on. HN has basically no restrictions whatsoever, and it's hardly a hive of scum and villainy: it's not fundamentally difficult to accomplish this, you just have to put the work in.
