I just thought about another reason I might rate someone down, and yes, it's about rating someone down for having opinions that differ from mine. I do it when someone's post differs so completely from my own values that the alternatives are a whopping big flame (and everybody knows I don't shy from those!) or a rate-down. So, I use rate downs as a control on my temper. Does it help? well it helps me, even though it harms the karma of that hypocritical, greedy, violent, malevolent, vengeful, cowardly, deadly, mendacious, meretricious, loathsome, despicable, belligerent, opportunistic, barratrous, contemptible, criminal, fascistic, bigoted, racist, sexist, avaricious, tasteless, idiotic, brain-damaged, imbecilic, insane, arrogant, deceitful, demented, lame, self-righteous, Byzantine, conspiratorial, satanic, fraudulent, libelous, bilious, splenetic, spastic, ignorant, clueless, illegitimate, harmful, destructive, dumb, evasive, double-talking, devious, revisionist, narrow, manipulative, paternalistic, fundamentalist, dogmatic, idolatrous, unethical, cultic, diseased, suppressive, controlling, restrictive, malignant, deceptive, dim, crazy, weird, dystopic, stifling, uncaring, plantigrade, grim, unsympathetic, jargon-spouting, censorious, secretive, aggressive, mind-numbing, abrasive, poisonous, flagrant, self-destructive, abusive, socially-retarded, puerile, clueless, and generally Not Good person.