Greetings form KLIA.

Just thought I would share, my dismay with a passenger on CX767 this morning, who decided to self upgrade himself from Y to W with no intervention from the cabin crew when they came around to do service.
This guy was sitting in our seats when we arrived, asked him to move, then 10 minutes later another passenger kicked him out of their seat then 2 mins after take off he made a bee line to PE.

Never have considered this myself but has it seems tolerated maybe on my return Y trip in a few weeks I will self upgrade too! :P Just kidding.