My 4s didn't leave the store without a screen protector. I hadn't even paid for it yet and the rep installed the screen protector. Screen scratches and scuffs make my positively psychotic so I don't take a chance. One minute I'm fine, everything is hunky-dory, and then I notice a screen blemish. Suddenly I'm in the corner of the room, curled up in a fetal position, humming show tunes quietly to myself. Nobody wants that.