I do think that kids behave better when they believe that 'someone' is watching them. Is it worth doing - I don't know.
I was raised with the idea that everyone was watching me, and I behaved pretty well. I consiously avoided planing that idea in my son - going for the more abstract, "You are watching you; Choosing well today with small challenges helps you choose well tomorrow when the challenges are larger."
I think even with his PGness, it was still too abstract for him -or perhaps it worked really well but we'll have to wait 15 more years to see it. There is something reasuring about small children behaving well that I certianly missed out on. It sure disinclines me to judge other people's parenting!
((shrugs and more shrugs))
Grinity