Child porn is criminal and has nothing to do with civil law.<p>Piracy in the way you're talking about it is also criminal law, i.e. you are getting the authorities to preemptively intervene for you.  If you just need proof, their copying disks is sufficient, you wouldn't need to seize everything.  This is in fact an alleged piracy case.<p>Civil law would come into play where you're trying to get an injunction to stop someone from continuing to commit piracy, e.g. <i>Apple v. Psystar</i>, where that sort of thing was handled in discovery.