Back during the discussion about Chris's possible shoplifting from Best Buy, a few people evoked the image of Chris standing in the middle of the aisle, looking left and right in a cartoonishly exaggerated manner before stuffing the item under his jacket. Given that Chris believes someone--least of all HIM--can disguise their identity by wearing sunglasses, makes me believe that this is precisely how Chris would shoplift.
I guess no one can recognize Chris if they can't see his heterochromia.
Funniest thing is that he probably mulled over this plan for a while, then when he arrived at the Wal-Mart, he sat in the parking lot nervously turning the sunglasses around in his hands for a few minutes. While he's inside the store, his heart beats like a (steel-plated) drum in his chest (moreso than usual due to his fatally high cholesterol), as he imagines menacing jerkops scouring the aisles, ready to pounce on "that damn Christian Weston Chandler" as soon as they notice him. When in reality, everyone had forgotten about him by that point, and if anything he was only drawing more attention to himself by being "that shady-looking guy in sunglasses who keeps looking nervously over his shoulder."