Read my post again ! once onboad my iphone goes on and I hear nothing ... The point I am making is the PA's that cut into your IFE on other flights with other Airlines annoy me 10x as much as any announcement for train tickets which I repeat I dont hear.
And as for turning the lights down have you ever took a red eye on BA with the heating turned up so much you cant sleep anyway and dont get me started on the sour faced CC that are about 100 yrs old and look like if they have to talk to one more Passenger they would rather jump from the Aircraft at 34,000 feet.