Yes.
Your question seems to imply that a person can't have fun without engaging in some vice. Is that what you believe?
I assume that you think books that portray witchcraft in a positive light represent a trivial issue. But I believe otherwise, because I believe that witchcraft is real, and I've read enough accounts of lives lost to the occult that I must in good conscience warn people against it. The Bible also condemns witchcraft in no uncertain terms:
Let no one be found among you who sacrifices his son or daughter in the fire, who practices divination or sorcery, interprets omens, engages in witchcraft,And some other relevant passages:I will destroy your witchcraft and you will no longer cast spells.
Many casualties, piles of dead, bodies without number, people stumbling over the corpses- all because of the wanton lust of a harlot, alluring, the mistress of sorceries, who enslaved nations by her prostitution and peoples by her witchcraft. "I am against you," declares the LORD Almighty.
The acts of the sinful nature are obvious: sexual immorality, impurity and debauchery; idolatry and witchcraft; hatred, discord, jealousy, fits of rage, selfish ambition, dissensions, factions and envy; drunkenness, orgies, and the like. I warn you, as I did before, that those who live like this will not inherit the kingdom of God.
"Do not be afraid of those who kill the body but cannot kill the soul. Rather, be afraid of the One who can destroy both soul and body in hell.""But if anyone causes one of these little ones who believe in me to sin, it would be better for him to have a large millstone hung around his neck and to be drowned in the depths of the sea."
"Finally, brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable–if anything is excellent or praiseworthy–think about such things."
You ought to be endorsing the skeptical side of this argument, then -- the alternative is to believe that God was unable or unwilling to deliver on His word.