Damage to the airplane like this during baggage loading is supposed to be the highest maintenance and repair cost for any airline. This type of injury to the plane needs to be eliminated before they start flying the composite bodies of the 787. So I'll bet these incidents with Alaska are being taken very seriously by other airlines as well.
Composite even in areas around baggage hold doors and cabin doors? If so, seriously scary shit! I understand well how composites are becoming more and more common in all sorts of structural parts of a/c, but still ... I wouldn't mind a weight/material penalty where abuse is likely.