Stichting brein is nothing more but a maffia corporation within the netherlands though. by a figure of speaking ofcourse.
FTD, the newsgroup dutch thing is already sueing them. If the torrent sites would actually step out and sue companies like that, they will be epicly destroyed.
Stichting brein has been caught getting personal user information from internet providers like kpn, wich is against the dutch law in everyway. As companies like KPN are not allowed to give away user information if the user has not been informed or signed for it. Privacy law is rather strict.