Zero-knowledge proofs

This is something I know Kevin has talked a lot about - but is this on the road-map any time soon? The big differentiator for a social news site right now is going to be proving human-ness, especially as the world grows into bot-slop - and the idea Kevin had floated around proving you're "an expert in Japanese woodworking" really sounded like a game changer for the dying internet we seem to be moving towards.