In regards to not showing receipts... I did this at Walmart when I bought my Xbox360. Bought it in the back of the store, walked through the store & out the door with receipt in hand. Heard the word "sir" about 4 times, but I never looked back. Just held up my receipt & kept walking and noone followed me to my vehicle. Done it several times at Frys also, I usually just say "I'm good" or "No thanks" and keep walking. Noone has ever followed me out. The only thing I do is make sure my receipt is visible in hand.