We cannot change our past. We can not change the fact that people act in a certain way. We can not change the inevitable. The only thing we can do is play on the one string we have and that is our attitude.
I have three kids who like Harry Potter so I was sort of aware of it. You can't really move from it: it's on buses in stores it's everywhere. One of my kids has read the books the other two are too small but they like the movies.