I find myself wondering if something similar to the IWF proxy could be set up to deal with known card sharing servers.
That it would immediately identify those using them is, of course, purely a bonus
If anyone wants technical details on this happy to provide, else I'm sure those in the know already know how the Cleanfeed box works
EDIT: This does of course assume it's not already in place. Could be automatic and effortless actually, all scripted and based on parsing packet captures.
2nd EDIT: No it can't, legal reasons.