ScottC I agree.
I am personally against exploiting mistakes (like apparently wrong priced offers, typing errors, etc. etc.).
I am all for getting the best official price, the best ratio of personal costs/rewards/services for me (and as many FT colleagues as possible).
But if 'in doubt' I am (and play) the consumer ('s advocat) and not the airline's controller.
I still believe that the (airline) consumer is in average knowledge far behind what airlines know about pricing, etc.