This is obviously to teach children to be aware of the possibility and the danger of abuse.
As soon as he was potty trained, my eldest DGS would send everyone out of the room if he needed to go to the toilet. Since then, I have always asked the DGC of both sexes if they would like me to leave the bathroom if they are on the loo. Some do, some don't, but they have been given the choice and been made aware that there is such a thing as a private sphere.
This would never have occurred to me with my own boys, but I was a very "hands off" mum anyway. Their own children seem to have a very sensible attitude, so it has all turned out fine for both of those generations. The little ones are certainly consciously trained to protest at being touched unsuitably - something we didn't do in our time, although there may have been some mention of it in kindergarten.
And I'm sure my own parents would never have even been aware of any threat, or if they were, would have been too embarrassed to say anything or to even imply that we, as babies, would ever have to defend ourselves..
Let's hope that bringing this out into the open and raising awareness in the children themselves will help to prevent child abuse in the future. I fear, however, that the lady who started this debate is preaching to the choir and that the real perpetrators will never get to hear this sort of discussion or if they do, will poo-poo it (excuse the pun)