If you block the packets, people will just use a VPN.

The best you can hope for is something like the Great Firewall, which only works on normies.

Sure, ultimately technical/knowledgeable people will be able to get around it. But preventing normies from accessing Anna's Archive is what they care about, because most people are normies.

In this scenario your VPNs would still need to find a ISP that would let them route packets out of that country. This means that instead of a legit VPN company you have to deal with cyber criminals to get such a VPN.