In general, a /64 is being assigned in a similar way to a single IPv4 address is used today. Blacklisting a /64 would be similar to blacklisting a single IPv4 w

In general, a /64 is being assigned in a similar way to a single IPv4 address is used today. Blacklisting a /64 would be similar to blacklisting a single IPv4 with multiple machines behind a NAT. If anything this gives us more control. You can start by blacklisting individual v6 addresses, and if you notice an above average number are from the same /64 knock off the whole thing.