<i>&gt; welcome to a world of people with millions of &quot;addresses&quot;</i><p>... in the same &#x2F;64 range for the most part, so as easy to block&#x2F;filter&#x2F;limit as one IPv4 address.<p>You risk inconveniencing people who are assigned just a few addresses because you potentially end up blocking many of them due to the actions of a few on the same subnet, but you can&#x27;t be held responsible for hosts&#x2F;ISPs doing IPv6 wrong.