Yes, the consumer should take the responsibility. Duh....No, you are costing Apple the value of one new iPhone back piece and the installation of it. Where do you draw your line on costing others money?
Like I said, Apple has been replacing iPhones for people even with accidental damage. Why blame him when Apple's the one doing this? Apple doesn't have to, but they have been, although I don't know if they're doing that now.