What if they use someone else's device though? Or circumvent the filter? Come on, this is Hacker News, "we" circumvent guardrails because we can and because we know no security is perfect, often from a young age.

I love how a lot of the "this is the parents' responsibility" opinion-havers don't seem to remember what it was like to be a kid themselves and / or don't have kids of their own.

The metaphor still works, minors in pubs are, presumably, under the supervision of their parents, otherwise they have not business being there in the first place.