Whether the copyright is being baffled or not is one thing. Catching the culprit is another.
I would suggest hosting the files on a server somewhere far ( Any US state will do) and keeping the info on the actual person who posted them as nebulous as possible.
Legally speaking, the amont and lenght of red tape needed to attack anyone for breach of property rights on a web based platform is monstruous. Don't even worry about that. Look at how long it took the US music industry to close down Napster... And there you're talking about a US organization attacking a US based company.
Cheers,
Frenchy