Let's suppose that a portion of those who read the Harry Potter books do, indeed, try to practice the "magic" portrayed therein.
A young child points his carefully crafted wand at a nearby rock, reciting the magic words intended to make it rise into the air. "Alarte Ascendare!" he shouts. And.....nothin'. Perhaps he didn't say it quite right?
He tries again. And again. And again, to no avail.
Lesson learned? Magic doesn't exist. He's disillusioned, but a bit wiser.
It’s the act that causes damage, silly. Not the fact that there’s no cartoon-level hocus pocus.
I believe we of this generation would do well to forget what we learned as kids from Caspar the ghost cartoons and similar garbage throughout our lives from Hollywood.
We learned to model fantasy from these, not to expect reality as experienced on a daily basis.