FYI, despite many attempts my oldest son has yet to be successful at casting a Cruciatus Curse on his younger brother.
Do you also forbid your children from reading books which contain themes of rebellion? I'm not sure if you remember but the Bible does say that "rebellion is as the sin of witchcraft." (I Sam 15:23)
I keep telling people I learned how to turn them into newts from reading Harry Potter, but no one believes me...