It amazes me how many people walk up behind me and then act all surprised when they get caught. It’s not often happened to me in the street but quite a few times in customer’s gardens. Same as when you are reversing a car in a car park and people walk right behind you whilst you are manoeuvring.
It's the trad guys up ladders I feel sorry these days. Timber
Surely if you're working on the highway, it is up to you to make sure pedestrians are safe as you pole?