RapidShare's answer to that question is:
No, RapidShare protects the privacy of its users. Only the person storing a file on RapidShare receives the download link. That person can decide who should have access to the link. A file can only be downloaded if the download link details are known.
Isn't it possible to search RapidShare using Google's "site:" parameter? For example:
"martial arts" site:rapidshare.com
fetches some results from rapidshare servers.