While some cultures hold that the evil eye is an involuntary jinx cast unintentionally by people unlucky enough to be cursed with the power to bestow it by their gaze, others hold that, while perhaps not strictly voluntary, the power is called forth by the sin of envy...it is sometimes asserted that the one who looks upon another with envy is not always at fault, but that the envy may be perceived by God, who then may redress the balance between two people by bringing the higher one low. It has been suggested that the term covet (to eye enviously) in the tenth Commandment refers to casting the evil eye, rather than to simple desire or envy.

...I simply want the shouting down saved for situations when it's truly appropriate, like Vincent_21 threads.