Random question: I ordered an iPad from an online store, as it offered a good deal. Unfortunately UPS screwed up the shipping so I won't get it before the 4th of Jan. I'm wondering if I could go to the local Apple store, pick up an iPad there, then return the unopened iPad I'll be receiving from the online dealer to that same Apple store on Jan 4. Will they check the serial number at receipt? Of course I could use the Apple store's iPad for a week and then start using the one I ordered online and return the opened one to the Apple store. But that would hurt Apple since they can't sell an open box item at full price. Hence my question.