In contrast in J on BA the cabin crew make sure the screen is deployed and visible before the safety briefing starts. They then stow them when checking seat belts, bags stowed and seat in correct position. This sends a signal that the safety briefing is important which, to me, reflects the safety culture at operation on that airline. Likewise, as mentioned in other threads, I have witnessed BA offloading a pax who would not obey crew orders to be quiet during the safety briefing. These are reasons I kept flying BA even when the crew were moatly grumpy (i.e. in the prolonged industrial action that created so many problems; fortunately there was a return to the very high service standards once it was over).