Non lethal vigilante justice is still vigilante justice

I think if Luigi had merely assaulted the CEO to teach him a lesson, and not killed him, then we probably wouldn't be having this discussion nationally. Or at least not to the same level of debate. That (admittedly arbitrary) line is a reason most DC characters like Batman and Superman generally refuse to kill even the most deserving of villains.

Well I suspect the lethality of said justice in this case is quite critical to the judgment of being _objectively_ wrong.