Man, I watched their Death Note one and it really made me want to kill myself. I actually had to tear my headphones off and throw them against the wall to escape. Strangely, the song didn't end much differently in their version compared to the real version (ooooo, wicked burn on Maximum the Hormone and their retarded ending for "Whats up People").
I throughly enjoyed their response to "all the jealous haters" and how they talk about how being from Ohio ("it means good morning in Japanese, people!") makes them part Japanese and that if you aren't from America you're probably a Communist. These people are probably near the top of my respectable troll list; they can troll like motherfuckers and deflect the backlash with complete impunity for how awful they are.