The WalMart nearest my old house used to have someone who was buying up all the new McFarlane sports figures, and then return old Starting LineUps that he bought down the street at the flea market for $1 or less, with PHOTOCOPIES of the barcode from the McFarlanes glued over the old SLU upc codes.
There are some real bums who hurt the hobby. I've seen guys with calipers measuring the thickness of packs, and bringing in digital scales to check weight
of packs.