This is all I get in the whois =

RJG Engineering Inc
Lauck Gary (info@zensurfrei.com)
+1.4024846791
Fax: +1.4024846796
PO Box 6424
Lincoln, NE 68506
US

Try that email addy, write em and tell them you'll report them
(Unless you already tried that)

In which case, report them and see if their server/hosting will take em down

What the hell are the sites anyway?
I mean it's all in German, and the domain is owned in the US....weird eh