The airlines have discovered a revenue source. Instead of trying to price the flights a level they need to to be profitable, they are using the fuel costs as an excuse to start charging all these extra fees. (Not the the oversize baggage fee did not exist before, but not for the charges I see now)
Instead of charging everyone $100 more for a flight, they are hiding increase in fees. Until they realize that these hidden fees are driving away passengers to South West Airlines or away from air travel altogether, they will keep do it. Eventually people are going to be unwilling to fly if it is going to cost them $200 more in add on charges.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013