Potter is fantasy. It is no more harmful than Mickey Mouse, Snow White, Santa Claus, or the Easter Bunny.
Oh yeah! Santa clause is EVIL. He breaks into your house while his filthy animals tear up your roof, gets soot all over the den,eats your food and leaves cheap imported junk for the kids to hurt themselves on...
Worse is Snow White. A young lady should not live with 7 surly men no matter how short they maybe...