It wouldn't work because the first site would still be facilitating copyright infringement, and thus still subject to legal pressure. Calling it by a code-name

It wouldn't work because the first site would still be facilitating copyright infringement, and thus still subject to legal pressure. Calling it by a code-name doesn't remove its copyright, nor does hiding it amongst legally redistributable torrents. Simply put, you'd sue everyone involved in the creation of that infrastructure. The second site and the guy who wrote the browser plugin may be able to escape unscathed, but the first site would be in exactly the same predicament as The Pirate Bay, Mininova, etc., except with the added bonus of trying to hide what they were doing. That wouldn't go over well in court.