Again, no more so than ABSOLUTE will, which I still consider far more inherently evil.
Then again, I happen to think that certain injustices SHOULD inspire uncontrollable rage in people, to the point you kind of lose your right to call yourself human if you DON'T rage uncontrollably over them.
It's kind of like the Punisher - I don't think every character (or even a majority of characters) should be like him, and I've protested rather loudly when they've tried to turn other characters into him, but given Frank's background, and all that he's seen, being an unstoppable killing machine is arguably the only SANE response that a human being could have in such circumstances.