I can understand why they'd think that. Anyone whose been apart of the Pagan community for a short time can tell you that there is a lot of misinformation out there. Every Pagan has gotten stupid comments about green noses, pointy hats and eating children.
However, I rather like these movies and similar TV shows. (Charmed was my favorite!). That's because I don't see them as a representation of me. They are just fantasy. Werewolf movies do not represent wolves any more than vampire movies represent pasty white people.
I've used a picture of Maleficent here as a perfect example of a "bad witch" I like. Growing up I certainly didn't think she represented any group of people. Even at 7 years old, I knew she was just an awesome bit of fantasy.
I suppose I give more credit to people to critically think. I hope they can come to the realization that no, real Witches and other types of Pagans can't turn anyone into a toad, nor do we try.
Are you angry with movies that represent Witches and Wiccans negatively?