Risk of DMCA Enforcement
The unforeseen risk of DMCA enforcement is that it drives torrent sites to even more effective methods. Case in point: The Pirate Bay (TPB)
Yes DMCA enforcement still has TPB worried about the availability of it's domain name and service; why TPB is continually relocating its domain address.
But TPB cloud servers can be disconnected and moved. Even if blocked by a state controlled authority, it's easy for TPB to resume ops in a short time by moving to another provider.
Per TorrentFreak: "In total the VMs use 182 GB of RAM and 94 CPU cores. The total storage capacity is 620 GB, but that’s not all used. Needless to say, that is relatively modest considering the size of the site."
TPB virtual machines are hosted with commercial cloud hosting providers who are unaware that TPB is a customer. That's because traffic goes through the load balancer, masking what the VMs are doing, and making sure that none of the IP-addresses of the cloud hosting providers are publicly linked to TPB.
The full TorrentFreak article: http://torrentfreak.com/the-pirate-bay-runs-on-21-raid-proof-virtual-machines-140921/
more reading: Electronic Frontier Foundation's take on DMCA effectiveness: https://www.eff.org/issues/dmca