Respecting your opinion that QF is ethical, one could cite many instances of QF not complying with its own published ethical and corporate guidelines.

These range from seeking political favour (e.g. gifting wine, upgrades, Chairman's Lounge membership), to dishonest and lack of transparency (e.g. changing FF T&Cs without due notice), to overcharging for credit card transactions, to attempting to change contract terms (gift voucher becomes a credit voucher, Starclass becomes business class upon attempting to reschedule a flight), to lying about the nature of fuel surcharges, collecting fuel surcharges or initineraries where the airline flown does not charge them, etc., etc.

Another example could be attempting to impose T&Cs on a contract of sale which are not compliant with consumer / trade practices legislation / various legal conventions - as Dave Noble has already pointed out, such legislation would over ride the airline's contract of carriage. However, the disadvantaged customer is left with the problem of seeking recompense for legal non compliance.