Ditto, I've never scratched a game before.
Thinking of horrible crap on a disc, the honor doesn't go to Gamestop. Blockbuster doesn't ever look at their rental discs. I rented something once, and I'm not kidding, it had a band-aid stuck onto it. I can only assume some stupid kid scratched it and thought a band-aid would fix it... I peeled it off and cleaned the disc with some solvents (like I care about Blockbuster discs (incidentally, paint thinner can sometimes have interesting destructive effects on discs)) and the movie played flawlessly. Stupid kids...