I don't necessarily agree that a shipper shouldn't be breaking anything. I think that they should meet whatever the agreement was. If the agreement is "we'll try super hard not to break stuff" and they're clearly not holding up their side of the bargain when it comes to bikes, then sure, changing the picture is fair game. If the agreement is "we'll pay for anything that breaks", then they should determine how careful they want to be, since they're footing the bill for it. Making that determination for them by changing the picture, I think is not totally honest, unless they also have a history of not paying up.