Ugh, some of the general tactics I threw out there for getting the server to cough up its info may have slight catches and flaws but the idea here is sound.  You're all saying they exist in happy magic land and nobody will ever catch them.  Well guess what, their web server is a computer and it's sitting somewhere connected to the internet with an ISP or host and an IP address.  That means someone could find it out.

Obviously they set up their server(s) so perfectly that it's not exactly easy but if you think it's impossible to find out the server's true info, you're dreaming.

Oh, here's the short version of why the FBI hasn't caught them: when has the FBI ever been able to stop anything illegal anywhere outside the US?  I guarantee it's not hosting inside the US, lol.  So they could have the IP, mac address, name, and an 8.5x11" glossy framed photo of the server and if it's in some European or Asian country, good luck getting the plug pulled on it.  Go ask the MPAA how hard it is to get other countries to comply with their takedown requests.