Hi FW,
I was only teasing about the 70% stuff! :-) I know what you mean, though, and I guess the pinch of salt is just to take on the basic structure of the story as the one to follow.
But as Squiddo says, anything to get the kids interested - I spent a great deal of my formative years absorbing all sorts of folklore and legends. If that leads to more people wanting to understand and preserve these places, then that's only to the good. And whichever way you look at it on that principle, the early Christians have been well and truly thwarted . . . . . :-)