Ah yes, Air Transat, I have dealt with them on a ground handeling level before. Was fortunate enough to have a bundle of them position on a flight from YYZ to LHR a few months back and managed to talk the CSD out of putting them into the few empty seats in Club!
Its not that I have not come across situations like this before but when it happens it really riles me up. Especially when its not an "observed dislike" from a distance but after I had actually been politely introduced to the person.
I regularly get crew from the likes of Emirates, Gulf Air, etc, and the odd royal flight crews heading back to work to the Middle East. Always great to talk to (as Im ex Qatar crew and know how they feel) and love upgrading them because they really appreciate it as they would never expect the same from their airlines so its always a treat for them.