alt Hacker News> Instead, the default should be, that if there is no header or it cannot be parsed, then the content is unsafe.
That's something the client should be doing. You can configure your own device (or your kid's) to have whatever default you want.
The actual problem is that classifying the entire firehose of user-generated content is precarious and uneconomical, so the default tag is going to be whatever minimizes liability. If untagged implies "unsafe" and "unsafe" minimizes liability then the majority of content will be untagged. If untagged implies "safe" then the majority of content will end up explicitly tagged as unsafe, because tagging it as unsafe minimizes liability.
But either way if you disable "unsafe content" you'll end up disabling almost everything, specifically including the huge amount of "safe" content which isn't tagged as safe because accurately classifying it is uneconomical.
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If the default wasn't "almost nothing" then you'd be sanctioning exposing some kids to content their parents didn't want them to see. If there's no economic incentive to tag content then it's not valuable content for kids.
Ultimately the problem is the provider knows what category the content is and the parent knows what the content policy is. Providers can't say whether it's "safe" or "unsafe", only what standards it complies with. Some parents will have weird policies like "only G-rated movies or any Jim Carey movie" that can't even be delegated in any reasonable way to providers.
So the header has "PG-13, US-legal" because it's a movie rated PG-13 and constitutionally-protected legal content in the US, and whatever other markets you want to open up. Providers could even include AI ratings so as to mass-tag their content at low cost, and parents can decide if a particular AI rating is okay.
Parental controls could even restrict official ratings to country of origin, so if you approve PG-13 it'll block that content from countries where you can't sue them for lying about it.
Basically we'll get 99% of websites with headers that amount to "Online Interactions Not Rated by the ESRB"