I'm against current copyright regime. But, "user-submitted translations of movie dialog" is clearly derivative work and in violation of copyright (at least in USA).

If you want wide spread awareness of and support for copyright reform (and I do) then you MUST educate the average person just how egregiously overreaching, damaging, and one-sided copyright law is AND how fast it's becoming even worse.

The average person doesn't care cause the average person doesn't know "user submitted translations" are violation.