Not sure how much I believe of the article and its lack of detail and chopped quotes...but did HE really disconnect an entire downstream network over a DMCA notice, or did they null route a /32 that was used by a customer to host hundreds of virtual web sites?
Since the tools at a network operator's disposal are ACLs which make it easy to block traffic to a /32 without the need for deep packet inspection, one would expect that this regularly causes collateral damage if that /32 is a web server hosting hundreds of virtual websites. But, when IPv6 is a bit more common, there is no need for virtual hosters to share a single IP address between several sites. They may as well use a unique IPv6 address for every single site, even if they are all on the same server. The side effect of this is that it makes the network operator's tool sharper, and able to knock down single sites with a /32 ACL. For a hosting provider, I would think that this strengthens the business case for IPv6. --Michael Dillon