Necroing my topic after reading about the other Lantern Corps, mostly Black and Red, but also remembering Driq, a Green Lantern whose willpower was so strong his Green Lantern ring would not let his life force leave (he was undead way before Blackest Night). With the Red Lanterns, they're essentially undead too: the ring stops their hearts and replaces their blood with red energy.
While some argue that they are necessarily evil, I feel sorry for them, even those as bad as Atrocitus. Is "we'll burn you all, that is your fate" necessarily a death sentence? With Atrocitus, probably yes. In general, is it any more specific than "In the name of the Moon, I'll punish you"? No. Their "hellish hate"? Totally justified.