You can email info to them at Member Services, they will pass it on to legal. As far as a hot line, I think their resources to find these people are such they don't need a hot line. They monitor all Ebay transactions and they monitor all Net forums such as these. That is probably enough.
Sammie,
I realize you have "sources" so I take you at your word on this and I don't doubt it for a second. Monitoring and enforcing are two different things, however.
Have your sources revealed any knowledge of enforcement, i.e frozen accounts or revoked memberships? Has any of the removed websites been taken down for anything other than copyright violations?