I think another mistake teachers are making is equating the occult with satan-worship.
From dictionary.com:
oc·cult
adj.
1. Of, relating to, or dealing with supernatural influences, agencies, or phenomena.
2. Beyond the realm of human comprehension; inscrutable.
3. Available only to the initiate; secret: occult lore. See Synonyms at mysterious.
4. Hidden from view; concealed.
5. a. Medicine. Detectable only by microscopic examination or chemical analysis, as a minute blood sample.
b. Not accompanied by readily detectable signs or symptoms: occult carcinoma.
Nowhere do I see "Or, or relating to, the worship of Satan."
Of course, dictionary definitions are not always accurate, especially since dictionary.com defines satanism as "the worship of devils (especially Satan)"
Do some research on "modern" satanism. I put "modern" into quotes because it's arguable whether satanism existed before Anton LaVey and the creation of the Church of Satan in 1966. Satanism is a very solipsistic religion, and its followers do not worship any gods but themselves. Satan is the name given to the dark forces at work within everyone.
Accusations against children's entertainment, such as the ones aimed at Teletubbies, Pokemon, and now Harry Potter, are the last gasps of the Satanic Panic that started inthe 1980s. Satanic Panic fueled a modern-day witch hunt against many innocent individuals, some of whom are still serving time in prison today (see West Memphis Three), fueled by so-called regression therapies. Everyone was freaking out that there was an underground Satanic network indulging in ritual abuse against children, and people were coming forward saying they'd uncovered childhood memories that such abuse had taken place.
It's nonsense, and dangerous nonsense for everyone involved. I'm not saying ritual abuse has never happened, or that regression therapies don't work, but that if you do your own research on the subject, looking at both sides of the argument, you'll see there is a lot of debate, and too many cases where people's family lives have been ruined over false memories being "recovered".
Personally I wouldn't want my kids watching Teletubbies and Pokemon, or reading Harry Potter, because I don't think such things are intellectually challenging at a time when children need to be stimulated in that way. However, I certainly wouldn't stop my kids from reading the books if they wanted to, but I doubt I'll keep a television in the house if I do someday have children.