Zero-knowledge proofs are unworkable for age verification because they can't prevent use of somebody else's credentials.

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a022311 2 hours ago | parent [-]

The same argument could be said for other age verification methods. Nothing stops a kid from getting their older cousin to verify their identity for something and it will never be possible to prevent this.

	▲	mrob an hour ago \| parent \| next [-]
		The people proposing these laws presumably think imperfect enforcement is better than no enforcement at all. In the non-zero-knowledge case, it's possible to revoke falsely shared credentials.
	▲	gzread an hour ago \| parent \| prev [-]
		The one where the root user can enable parental controls requires the kid to know their parent's password or save up to buy their own device.