I haven't received my sets yet so I thought you could see the sketch thru the cellophane. If that was true you couldn't scam anyone.
I see what Ernie is saying, someone could re-wrap a set if they had the equipment, and since some sets have the sketch in the wrap around the postcards, inside the folder, those would be even easier for a scammer. I'm hoping that such re-wraps will be noticeable, because of the odd shape, but who knows. Anything is better than what Topps did with series 7!
At the show Saturday I asked Mike J. why they didn't use Topps cellophane, and he told me it was because the company doing the packing could only feed the wrap in from one direction, which would have resulted in the Topps logo being inverted.