I work at Lowe's. If a product shows visable signs that it is defect, it is pulled from the floor. If it's in a box, how would anyone know if it'a bad? This is why the return process is easy at home improvement stores, for the most part. If we opened and checked every product, everyone would ask "was this opened because it's used?" or "can I get a 99% discount cuz this is opened?"