Starfox
Hero
I'd like to point out that hunting and killing followers of vecna is about as morally ambiguous as hunting pedophiles would be here on Earth. It might be imbalanced and illegal but it's not psycopathic. He's not Dexter, he doesn't have to kill. He probably enjoys it much more than he has to, but he isn't compelled to do it impulsively.
murdering followers of Vecna
Hunting and murdering pedophiles RL is not morally ambiguous at all - it is outright evil. That is pretty much the definition of murder. Same with followers of Vecna. Psychopathic might be a stretch, but any non-psychopath who is a habitual killer is likely to be quite deranged in other ways. In RPGs this kind of behavior is often acceptable, it is a kind of "war on terror", but the villain is generally killed resisting arrest which makes it not murder. To use the word murder as the OP did shows me this guy is going to extremes.