I have a small hosting company and one client have a forum with rapidshare links. Its a problem that to my business?
If he's only linking to the files then I don't think you got any problem. But, make sure he don't upload any of the files (copyrighted material) on your server. It also depends on the country where the server is located.
Not too sure, because TV-Links was shut down because they were linking to uploaded copyrighted videos on Google, YouTube, Veoh, etc.. etc..