While it's a documentary, it's obviously got an agenda, and director Jack Kirby is attacking the MPAA and it's rating board, portraying them as a hypocritical, censorship group. It's got interviews with Kevin Smith, John Waters, Matt Stone, etc. I was reminded of how my brother refers to the "gay canon" as they also feature Jamie Babbit of But I'm a Cheerleader, Kimberly Peirce of Boys Don't Cry, etc.
I think this would be an awesome movie to show in a high school class, be it an art class, government, or some other connection you want to make. A good teacher/facilitator could guide some amazing discussions.
I'd highly recommend checking it out. You'll probably need Netflix to see it though, as Blockbuster doesn't carry it since it's unrated (the film originally got an NC-17, and after editing it, Kirby had to give up the rating). Some clips and related material seem to be up on youtube . . .
Oh, and check out the extra on the DVD . . . his Q and A at SXSW in 2006 is solid. I found the bit that the MPAA made an illegal copy of his movie particularly amusing.