Comment by throwaway_ab

Not sure how this would work, if you blocked those IPv6, the mostly innocent companies and people that are now blocked will be in short order getting a new IPv6 assigned by the ISP after a support call.

I was under the impression that these botnets still rely on vulnerable computers, which have a human that will be calling support asking for the issue to be resolved.

Then it needs an ISP to figure out the issue and ask the client to sort out their compromised computer, but unlikely the ISP will stop a paying customer from internet access especially if it's not clear why their original assigned IPv6 is blocked.