Don’t forget that in the past BA management overtly encouraged staff to consider back cabin passengers as unwanted but necessary by stating that they (management) would prefer only to carry premium “front cabin “passengers.
However, they admitted they still needed some cattle to fill up the empty bit at the back.
What's that got to do with anything? Where ever the crew work they should show some civility towards passengers. Judging by comments on various threads on this forum some crew don't give a t**s about passengers welfare regardless of class.