I agree that we ban chance moves like Evasion boosting and Inconsistent because they are broken, not haxy. Infuriating moves like attract are rarely used not because users hate them, but because they think they won't work well. When somebody uses attract on my Pokemon, I don't get angry just because they are using a haxing me, but because it is embarassing to be beaten by a move that competitive play shuns as noobish.
Confuse Ray, Sand Veil, and other "chance" moves is just as much strategy as it is luck. Am I willing to use a turn to give the foe a 50% chance to hit me for a while, or until he switches? What are the risks and rewards? There is no reason to ban something like that unless it breaks the metagame. I admittedly have never fought in a metagame that lacked the evasion clause, but if evasion was bad but haxy nobody would have used it anyway. Evasion turned out to be too good, so it was used, abused, and banned.