The Workplace Diva has a telling comment about unintended consequences and airplane baggage fees. Yep, you know what it is. More on board luggage. Airlines’ Per-Bag Fees Create New Baggage.
The post makes the point that humans are much better at adapting to changes than management is in anticipating those adaptations. And one of those in this case is unhappy flight attendants and increased work place injuries (not to mention unhappy fliers, including those who have had luggage dropped on their head!).
I have noticed it, and most of my flights are on SWA, still a baggage fee free zone.