How so? They're mainly targeting big ones and mostly succeeding (which concerns me). If only small ones remain then we'll be seeing a more fractured pirate community, well need to go into more sites to find what we need, and most will be walled off to majority of the public through private trackers or hidden chat communities. Which will then make it harder for possible new pirates to get into. Numbers are one of the things protects pirates. There are so many of us to prosecute us all, but if the community walls itself to the outside world then there will come a time that there will be few users left that targeting each them will become possible. (the most prolific ones, that is)
That would suck not just because usually is terrible slow (and I know it will just be the site not the downloads on tor) but because that might cause them to fight more Tor and use this as excuse.