Cahlen, I loved many works of scifi and fantasy. Not all is the same. That said, I cannot let my love of something in the physical/natural world prevent me from seeing into the spiritual anymore. Many objects open doors to demonic entities.
Naturally, if something was harmful to kids, then I'd recommend educating them about it and presenting better options.
If you don't see how witchcraft or luciferianism can be harmful or are curious about why it might be then, of course, this whole article would be moot to you.