As simple SLF I don't want anyone's head on a plate. All I want is to be sure when I board an A319 or A320 operated by BA or any other airline, these bits of the engines are not going to fly off and hit some vital piece of the tail, sending me and everyone else onboard into a quick dive to eternity. I used to have a boss who said the most important thing to do when any mistake was made, was not to apportion blame, but to ensure procedures were put in place to prevent such a mistake being repeated.
Couldn't a system be introduced whereby someone has to tick a box and sign their name beside it to say they've checked to ensure these bits of the engines are securely in position before the aircraft leaves its stand. This would ensure a manual check was made before each and every flight.