Does BlockBuster have sticker on their discs?

[The One Guy]

I have a bad copy of a video game and was thinking of renting it at Block Buster and placing the game in the case and eturning it saying it's defective. Only flaw I can think of though is if they put a mark or something to show that the game is theirs? Do they or is it just a plain disc no different from purchase?

Would I have better luck buying a used copy at Gamestop, swapping the disc then returning it for it being bad and getting money back? Ideas?