Infringement o Contrib. That s why you wanted pseudonymous users, etc. We informed you of 12,000 infringing files in December. You claim you terminated the users offering these files, but they re still available via other users. All ISPs have generalized knowledge that they may provide links to infringing materials.
Law requires knowledge that exchange of particular material is infringing.
Titles of MP3 files alone cannot be used to distinguish infringing from noninfringing files.