You grew up with the Mary Poppins movie, didn't you? Of course you did. We all did. I may have even seen it in a theater when it was released. I'm not sure, but I would have been about eight, so it could be.
But we all saw it on TV at least when growing up. And what a dark, twisted influence she was on us all. Evil. Terrifying. Corrupting. Drawing us into the lightless realm of malign power, ruthless domination, and the unspeakable horror of children being swept up into demonic influence by those they are supposed to trust.
I mean, cummon. Just look at the trailer for the movie.