On the subject of hi-vis jackets I make a point of not wearing one wherever I go. If I walk across to the clubhouse and someone kicks off then what are they going to do? Make me do the perilous walk back across the airfield without a hi-vis to grab one? I'd be killed instantly, surely!
I came across a jobsworth at Oxford who would not allow people back onto the apron to reach their aircraft unless they bought a hi-vis from him there and then.