I think I've previously stated my position on using a DT... J and N know oh so well [ lozl ]... but for the sake of this discussion....
I will kill you all... period... no one will escape... And when I kill you all I'll put my name in it and kill myself... there! Problem solved!
ahm.. I dont think that would solve the problem just make it bigger ... you have to think man. It's not so dificult, just... A certain way to kill 'em all without no one notice.. Just like a Ninja that' why is more usefull to think like a ninja ^^
Maybe.... It's because if I use the death note would be like playing to kami(god) so I dunno It would be kinda complex, and i would have to ideate a good plan ^^