Scenario: When purchasing a flight ticket on-line in Euros an paying in British Pound the user has two choices: by default there is a conversion of 0.9 Pounds a Euro when the actual rate is 0.87, alternatively, the user can tick a box so the conversion is made later. My complain: Since the exchange rate doesn't vary often, Aer Lingus is getting 3% extra of every transaction if the user doesn't tick the box. In other words, 12 Euros extra for every 400. The design of the website is conceived with the intention of misleading and lead the user to the default choice which is more beneficial for Aer Lingus. It is an scandal that the Association of Computer Machine or the British Computer Society don't pay attention to issues of this kind, I suppose that they are to busy writing codes of conduct.