Sophie Jenkins wrote:
"Because she wasn't aware that it was meant to be a collectible and that writing on a receipt +bag over the comic would do so much damage? It's a bookstore- they assume people want to read the things they sell, not keep them pristine for collecting. And I've often written on a piece of paper over magazines and books without leaving the slightest indent in the covers. An honest mistake should not get her a bad survey. In some places a bad survey can get someone written up or fired."
On the flip side of this, inadvertently damaging goods to the point where many purchasers would demand a refund (more than one poster suggested getting their money back, and I'd have said the same thing) is something that the store needs to address. A cashier who bagged stuff badly and thereby caused damage may have made an honest mistake but it's still a problem.
Sure, it's not their core product, but if you're going to sell a product it's reasonable to figure out what your clientele is going to demand and train your staff. Calistoga herself said that she hates buying comics from bookstores because of this, and she's far from rare in that regard, so a bookstore that took care with their comic titles would draw in people like her. If the cashier (and the management) gets the message that what she did was damaging to the comic, one would hope that they'll all be more careful with them in the future and that can easily translate to more business.