NoSanninWa:
I think you meant
the ends justify the means.
As for my 2 cents, I think the question is rather vacuous. Either way, both good things and bad things happen; the only distinction is who gets to pass judgment. And that is always the "winner."
That's more or less how I feel about this, and I think the "message" in Death Note pretty much matches that, based on the manga ending (although it may just be confirmation bias). I only read up to...
... and the ending, so maybe there was something I missed.