Don't worry, unless they set up a vote to "banish all US Copyright protected works" the inevitable RIAA/MPAA pressure will sort out the project by itself. I'm not delusional to claim Torrents are without legitimate purpose - they are - and I'm also not delusional enough to believe hosts/developers are powerless to address piracy of sorts.
Not only would it enable offline searching, but when the inevitable take down shows up, folks can still continue to search the database.