As for our customer service, the one that always seems to get the pax the most upset, is when we check their carry on, put ATL on it when they have a connection, and then tell them that they need to go retrieve it at baggage claim and recheck it, go back through security and catch their flight. All in 45 mins.
Those are the rants that I take note of. Problem is that the gate agents wite ATL ahead of time on the bag tag, and never think to change it or have a fit full on ones for ppl with connections. It is always noticed when we are deplaning, or enroute.