Thanks for making this crystal clear. The problem that this has - as we have seen independently by two FTers - is that these messages get out there, fueling an existing urban myth, and I imagine those in the Contact Centres occasionally get challenged about something which simply doesn't exist. These YouTube videos stand alone. If I put something like that on Flyertalk my mistakes would be rumbled within minutes by people more knowledgeable than me, and yet these videos have an impact out of proportion to their peer reviewed equivalents.

Having said that, the differentation between airline markets is relatively well known (e.g. internally in South America); and Norwegian is also known to offer different prices according to profile country. For Norwegian you don't need to change IP, just select a different country/language option, and it's a good opportunity to brush up on your Swedish. Some airlines have different code bugs which affect different languages in different ways. Iberia keeps their Castillan screens in better nick than their English language screens, plus Iberia sometimes makes offers visible to Spanish residents only.