"age" verification is a clever name, politically. a lot of people who are opposed to the privacy violation hear it and think, oh, the problem is we need to prevent information leak, which there's a lot of fancy math that could in principle do that
the problem is that it's verifying that a government-issued identity document says a certain thing on it
there have been like three laws just this month which attempt to stop trans people from getting IDs in various jurisdictions
