If there’s been a constant in the tech industry’s approach to the idea of regulating new products, it’s been the twin mantras of “leave us alone, we’ll take care of it” and “don’t make rules that will harm innovation.” But now there’s an exception: facial recognition. Governments around the world — with the huge exception of China — are also pondering rules to rein in this branch of artificial intelligence. Questions include whether any regulations would go as far as privacy advocates argue is