I think the problem they mean is a lack of NAT for IPv6 preventing anonymization behind a network device like your home router. This article addresses it a litt

I think the problem they mean is a lack of NAT for IPv6 preventing anonymization behind a network device like your home router. This article addresses it a little. https://www.internetsociety.org/blog/2015/01/ipv6-security-myth-3-no-ipv6-nat-means-less-security/ https://www.internetsociety.org/blog/2015/01/ipv6-security-m...