I was in the supermarket just now and a child was being, according to the parents, far too naughty. They were obviously bored and we just picking up jars and boxes to look at them and then putting them back. I was nearby and the mother snatched a box from the child and said, "Don't do that or that lady will shout at you!" I turned to her and said, "Actually, no I won't, because that's YOUR job" and walked away. This is not the first time I've come across this. When I used to work as a shop assistant, parents would regularly use this tactic to get their kids to behave. Why do they have to threaten their child with a stranger's wrath? Or should I be more sympathetic?