Passengers are also customers. On Ships, aircraft, busses, taxis and trains they are traditionally and correctly referred to as passengers. Let's cut the PC nonsense.
I would not refer to a passenger to their face as SLF but have no objection to the use of the term in jest amongst staff. Those of you who take offence at the use of such a term should perhaps ask medical operating theatre staff what references to the anaesthetised patient they have heard
