The Pirate Bay evades ISP blockade with IPv6, can do it 18 septillion more times

Was wondering about this too, but presumably that might impact other people using the range? (If the ISP owns it, rather than TPB). I don't know the specifics of the various court orders/rulings though.

They could do that, but ISP's prefer to not fill up their routing table with lots of null routes.

IPv6 addresses and subnet masks are 4 times the size of IPv4's - shifting IP's between a number of different ranges would start to make any network engineer cringe - especially if they start blocking at the /64 level (i.e. smallest allocation possible at the moment - 18,446,744,073,709,551,616 addresses)

Technically that is possible. Whether your local legislation allows ranges to be blocked (and on what basis) is another issue.

At least the Finnish court order that ordered a block on TPB IP's had individual IP addresses in there, so at least another court session is required to change the IP's or make a whole range blocked. It's worth noting that the Finnish ISP's were not happy to put any filtering, DNS or IP, in place and will not add any blocks voluntarily.

AS IPv4 addresses become more scarce and traded more often, newly purchased IP addresses may previously have been blackholed and are now useless. There are no easy ways to get an IP addressed off a blacklist.

With IPv6 it may be easier to justify blocking large ranges essentially due to the very large IPv6 address space.