Had a weird experience in KUL yesterday. Boarding a TG (MH codeshare) 747 to BKK, they called business, and a c.50 year old guy pushed through the queue waving his BA gold card. When the gate agents pointed out it was a TG flight, he exclaimed "it's a Oneworld airport! Top tier BA should have priority", and got sent to the back of the now extremely long Y line.